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金属顶刊双语导读丨Scripta Mater. Vol.200, 15 July. 2021(下)

2021-06-06 来源:GS_Metals

 

本期包含金属材料领域论文11,涵盖了高熵合金、奥氏体钢、高温合金等,国内科研单位包括上海交通大学、吉林大学等(通讯作者单位)

 

Vol. 200 目录

1. Mn-stabilized austenitic steel strengthened by nano-scale β-NiAl (B2), FCC-Cu, and carbides via ICME design

通过ICME设计,采用纳米尺度β-NiAlB2),FCC-Cu和碳化物强化Mn稳定的奥氏体钢

 

2. A binary beta titanium superalloy containing ordered-beta TiFe, alpha and omega

一种包含有序β-TiFeαω的二元β钛高温合金

 

3. Origin of high tension-compression yield asymmetry in as-extruded pure zinc

挤压态纯锌高拉伸-压缩屈服不对称性的成因

 

4. Novel eutectoid Ti-5Ni alloy fabricated via direct energy deposition

采用直接能量沉积制备新型共晶Ti-5Ni合金

 

5. Hardening induced by dislocation core spreading at disordered interface in Cu/Nb multilayers

Cu/Nb多层膜中无序界面处位错核扩展引起的硬化

 

6. On temperature and strain-rate dependence of flow serration in HfNbTaTiZr high-entropy alloy

HfNbTaTiZr高熵合金流动锯齿的温度和应变速率依赖性研究

 

7. The {10-12} non-cozone twin-twin interactions in Mg: A stability and mobility study using 3-D atomistic simulations

Mg{10-12}非同域孪生相互作用:使用三维原子模拟的稳定性和迁移率研究

 

8. Yielding behavior of a single-crystalline γ'-strengthened Co-Ti-Cr superalloy

单晶γ'强化Co-Ti-Cr高温合金的屈服行为

 

9. New Ms-formula for exact microstructural prediction of modern 3rd generation AHSS chemistries

新的Ms公式可精确预测不同化学成分的第三代AHSS的微观组织

 

10. Plastic deformation of solid-solution strengthened Hf-Nb-Ta-Ti-Zr body-centered cubic medium/high-entropy alloys

固溶强化Hf-Nb-Ta-Ti-Zr体心立方中/高熵合金的塑性变形

 

11. Pre-strain mediated fast natural aging in a dilute Mg-Zn-Ca-Sn-Mn alloy

预应变介导的Mg-Zn-Ca-Sn-Mn稀释合金的快速自然时效

 

 

SCRIPTA

Vol. 200, 15 July. 2021, 113903

1. Mn-stabilized austenitic steel strengthened by nano-scale β-NiAl (B2), FCC-Cu, and carbides via ICME design

通过ICME设计,采用纳米尺度β-NiAlB2),FCC-Cu和碳化物强化Mn稳定的奥氏体钢

 

Colin A. Stewart, Richard W. Fonda, Keith E. Knipling

Colin A. Stewart: colin.stewart.ctr@nrl.navy.mil 

https://doi.org/10.1016/j.scriptamat.2021.113903

 

摘要

采用集成计算材料工程(ICME)的方法设计了由β-NiAlFCC-CuM23C6碳化物这三种纳米尺度析出相强化的Mn稳定全奥氏体钢。采用Thermal-Calc预测了NiAlCuFe-17.7Mn-4.7Cr-0.48C (wt.%)基奥氏体成分相稳定性的影响。通过实验(1)合成CuNi+AlCu+Ni+Al改性的奥氏体基合金,(2)通过微压痕测量力学性能,(3)通过原子探针断层扫描(APT)表征纳米尺度的微观结构,验证了上述预测。根据Thermal-Calc模型,在580℃时效后,CuNi+Al改性的样品只有轻微的硬化。Cu+Ni+Al复合合金展现出强烈的硬化效果(强度为490 HVσy≈1200 MPa),这主要归因于FCC-Cuβ-NiAl纳米相的形成

向上滑动阅览英文摘要

An integrated computational materials engineering (ICME) approach was used to design a fully Austenitic, Mn-stabilized steel strengthened by three nano-scale precipitate phases: β-NiAl, FCC-Cu, and M23C6 carbides. Thermo-Calc was used to predict the effects of Ni, Al, and Cu additions on phase stability in a Fe-17.7Mn-4.7Cr-0.48C (wt.%) base Austenitic composition. These predictions were verified experimentally by (1) synthesizing alloys of this Austenitic base alloy modified with Cu, Ni+Al, or Cu+Ni+Al, (2) measuring the mechanical properties by microindentation, and (3) characterizing the nano-scale microstructures by atom probe tomography (APT). After ageing at 580°C, selected based on Thermo-Calc modeling, only minor hardening was observed in samples modified with either Cu or Ni+Al. However, the alloy with combined additions of Cu together with Ni+Al exhibited significant hardening (490 HV, corresponding to an estimated σy ≈ 1200 MPa), which was attributed to the formation of FCC-Cu and β-NiAl nano-precipitates.

 

 

SCRIPTA

Vol.200, 15 July. 2021, 113905

2. A binary beta titanium superalloy containing ordered-beta TiFe, alpha and omega

一种包含有序β-TiFeαω的二元β钛高温合金

 

R. D. Jones, A.J. Knowles, W.J. Clegg

R. D. Jones: robert.jones48@ntlworld.com 

https://doi.org/10.1016/j.scriptamat.2021.113905

 

摘要

α-β钛合金适用于航空发动机,但通常限制在~550°C。另一种策略是用有序β- TiFe金属间化合物增强“β-Ti高温合金”,然而,目前对二元体系中TiFe析出的研究很少。本研究将Ti-20Fe (at.%)合金在β-Ti相区进行1050°C的均匀化处理,然后在600°C进行时效,时效过程中Fe的过饱和促进了TiFe的析出。结果表明,随着TiFe体积分数的增加,合金的硬度降低,主要原因是:(1) 时效过程中β-Ti Fe含量降低至16.2%Fe的固溶强化降低;(2) 透射电镜观察发现,均匀化的β-Ti母相中类ω的不相称调制域在时效后,其尺寸和结构发生变化,导致ω析出的强化减弱;(3) 从较硬的ω强化β-Ti母相析出较软的TiFeα-Ti相而发生软化

向上滑动阅览英文摘要

 

Alpha-beta titanium alloys excel for aeroengine applications but are typically limited to ~550°C. An alternative strategy is reinforcement with the ordered-beta TiFe intermetallic, toward ‘β-Ti superalloys’, however, there has been minimal study of TiFe precipitation in the binary system.

 

Here, a Ti-20Fe (at.%) alloy was homogenised at 1050°C in the β-Ti phase field and aged at 600°C where the Fe supersaturation promoted TiFe precipitation. Curiously, as the TiFe volume fraction increased, the alloy hardness decreased, due to an interplay of mechanisms: (1) Fe solid solution strengthening, which reduces as the β-Ti Fe content falls to 16.2% on ageing; (2) ω precipitation strengthening, as ω-like incommensurate modulated domains were identified by transmission electron microscopy in the homogenised β-Ti parent phase and are suggested to change in size and structure after ageing, resulting in reduced ω-strengthening; (3) softening as softer TiFe and α-Ti phases precipitate from the harder ω‑strengthened β-Ti parent phase.

 

 

SCRIPTA

Vol. 200, 15 July. 2021, 113922

3. Origin of high tension-compression yield asymmetry in as-extruded pure zinc

挤压态纯锌高拉伸-压缩屈服不对称性的成因

 

Chun Chen, Hua Huang, Jialin Niu, Jian-Feng Nie, Guangyin Yuan

Hua Huang: huangh@sjtu.edu.cn  上海交通大学

Jian-Feng Nie: jianfeng.nie@monash.edu 

Guangyin Yuan: gyyuan@sjtu.edu.cn  上海交通大学

https://doi.org/10.1016/j.scriptamat.2021.113922

 

摘要

锌及其合金因其作为生物可降解植入物的潜力而受到越来越多的关注。然而,锌及其合金在塑性成形后存在明显的拉-压屈服不对称性,这是不希望出现的。本文研究了挤压态纯锌中强烈的拉伸-压缩屈服不对称性,揭示了拉伸状态下较高的{10-12}-1011孪晶活性是其根本原因。在此基础上,我们提出弱化织构和细化晶粒是降低拉-压屈服不对称性的有效策略

向上滑动阅览英文摘要

Zinc and its alloys have received increasing attention due to their potential to be applied as biodegradable implants. However, the distinct tension-compression yield asymmetry of zinc and its alloys after plastic forming is undesirable. Here we identify the strong tension-compression yield asymmetry in as-extruded pure zinc and reveal that higher {10-12}-1011twinning activity under tension is the underlying reason. Based on the finding, weakening texture and refining grains are put forward as effective strategies to reduce the tension-compression yield asymmetry.

 

 

SCRIPTA

Vol. 200, 15 July. 2021, 113918

4. Novel eutectoid Ti-5Ni alloy fabricated via direct energy deposition

采用直接能量沉积制备新型共晶Ti-5Ni合金

 

P. L. Narayana, Jae H. Kim, Sangwon Lee, Jong Woo Won, Chan Hee Park, Jong-Taek Yeom, N.S. Reddy, Jae-Keun Hong

Jae H. Kim: jaehkim@kims.re.kr 

Jae-Keun Hong: jkhong@kims.re.kr 

https://doi.org/10.1016/j.scriptamat.2021.113918

 

摘要

直接能量沉积Ti-5Ni (wt.%)合金促进了显著的晶粒细化,具有细小的等轴晶粒(~ 30-50 μm);具有不连续的晶界α、细小共晶α(宽度约1 μm)α+Ti2Ni相。在低于β转变温度下进行24 h的后处理,促进了近等轴相α的形成,温度显著影响了组织组成,包括预共析相α+保留相β+Ti2Ni(760°C)、预共析相α+α' +Ti2Ni(800°C)和完全α' +Ti2Ni(850°C)。与其他常规处理的Ti-Ni二元共晶合金相比,制备态和热处理态合金的拉伸性能显著提高。因此,本文提出的方法为更高效率制备其他共析成形合金系统开辟了新的机会和可能性,这可以克服其他制备工艺的局限性

向上滑动阅览英文摘要

Direct energy deposited (DED) Ti-5Ni (wt.%) alloys promote significant grain refinement with fine equiaxed grains (~30-50 μm); they have discontinuous grain boundary α, fine eutectoid α laths (~1 μm width), and α + Ti2Ni phases. Post-heat treatment below beta transus for 24 h stimulates the formation of near equiaxed α, and the temperature significantly influenced the microstructural constituents, which included pre-eutectoid α + retained β + Ti2Ni (760°C), pre-eutectoid α + α’ + Ti2Ni (800°C), and fully α’ + Ti2Ni (850°C) phases. The tensile properties of the as-fabricated and the heat-treated alloy remarkably improved compared with the other conventionally processed eutectoid Ti-Ni binary alloys. Thus, the proposed approach opens up new opportunities and possibilities for fabricating other eutectoid-forming alloy systems with improved manufacturing efficiency, which can overcome limitations in the other manufacturing processes.

 

 

SCRIPTA

Vol. 200, 15 July. 2021, 113917

5. Hardening induced by dislocation core spreading at disordered interface in Cu/Nb multilayers

Cu/Nb多层膜中无序界面处位错核扩展引起的硬化

 

Wenfan Yang, Mingyu Gong, Jiahao Yao, Jiangwei Wang, Shijian Zheng, Xiuliang Ma

Shijian Zheng: sjzheng@hebut.edu.cn  沈阳材料科学国家实验室;河北工业大学

https://doi.org/10.1016/j.scriptamat.2021.113917

 

摘要

原子尺度界面结构可以调整界面处的位错行为,并强化界面。在本研究中,我们通过在Cu/Nb多层膜中引入超薄非晶层来设计无序界面。与尖锐界面相比,无序界面可以松弛平面内和平面外的伯氏矢量,涂抹钉扎的位错,从而在Cu/Nb多层膜中引起显著的硬化。这一发现不仅证明了位错界面涂抹所引起的硬化效应,而且为采用无序界面开发超高硬度先进材料提供了思路

向上滑动阅览英文摘要

Atomistic scale interface structures could tailor the dislocation behaviors at interface, as well as interface strengthening. In this work, we design a disordered interface by introducing an ultrathin amorphous layer in the Cu/Nb multilayers. Compared to the sharp interface, the disordered interface can smear the impinging dislocation with relaxing the in-plane and out-of-plane Burgers vectors, thus inducing a remarkable hardening in the Cu/Nb multilayers. The findings not only prove the hardening effect induced by dislocation interface smearing, but also shed light on developing advanced materials with ultrahigh hardness via disordered interface.

 

 

SCRIPTA

Vol. 200, 15 July. 2021, 113919

6. On temperature and strain-rate dependence of flow serration in HfNbTaTiZr high-entropy alloy

HfNbTaTiZr高熵合金流动锯齿的温度和应变速率依赖性研究

 

Shuying Chen, Weidong Li, Fanchao Meng, Yang Tong, Hua Zhang, Ko-Kai Tseng, Jien-Wei Yeh, Yang Ren, Fei Xu, Zhenggang Wu, Peter K. Liaw

Weidong Li: wli20@utk.edu

Zhenggang Wu: zwu9@hnu.edu.cn  湖南大学

Peter K. Liaw: pliaw@utk.edu

https://doi.org/10.1016/j.scriptamat.2021.113919

 

摘要

金属合金在应力-应变曲线上表现为锯齿状流动的塑性失稳现象通常不利于合金的加工和制造。本文报道了HfNbTaTiZr合金中的流动锯齿,并通过实验研究了其对于温度(573-823K)和应变速率(5×10-5 s-1-1× 10-3 s-1)的依赖关系。在一定的应变速率下,随着温度的升高,锯齿状流动的起始应变由下降(正态)向上升(逆态)的显著转变被理论框架成功地模拟了出来。该模型成功地预测了起始应变作为温度和应变速率的函数,这表明在理论上为受测合金建立处理窗口的可能性

向上滑动阅览英文摘要

Plastic instability manifested as the serrated flow on stress-strain curves of metal alloys is generally detrimental to their processing and manufacturing. The flow serration in the HfNbTaTiZr alloy is reported in the present work and its dependence on temperatures (573-823K) and strain rates (5×10-5 s-1-1× 10-3 s-1) is investigated with experiments. The notable transition of the onset strain of the serrated flow from a declining (normal behavior) to rising (inverse behavior) trend with increasing temperature at applied strain rates is modeled successfully with a theoretical framework. The success of the model in predicting the onset strain as a function of temperature and strain rate represents a possibility of theoretically constructing a process window for the alloy under examination and beyond.

 

 

SCRIPTA

Vol. 200, 15 July. 2021, 113913

7. The {10-12} non-cozone twin-twin interactions in Mg: A stability and mobility study using 3-D atomistic simulations

Mg中{10-12}非同域孪生相互作用:使用三维原子模拟的稳定性和迁移率研究

 

Khanh Dang, Carlos N. Tomé, Laurent Capolungo

Khanh Dang: kqdang@lanl.gov

https://doi.org/10.1016/j.scriptamat.2021.113913

 

摘要

由于Mg中拉伸孪晶容易激活,多个{10-12}孪晶变体可以相互作用,在塑性变形过程中形成孪晶界。之前使用二维模拟的研究只提供了这些相互作用的部分理解,特别是非同域的交互作用。本文采用原子模拟方法研究了非同域{10-12}孪晶结的三维结构特征和演化过程。研究表明,基底棱柱和具有共格孪晶界的共轭孪晶界面发生相互作用后,会形成新的孪晶界(TTBs),如TTBBPTTBK2。对于两种非共域孪生相互作用,{-12-12}TTB及其相关的孪晶结对{10-12}孪晶的稳定性和迁移率起着重要作用。特别地,在相互作用过程中它们促进了三维孪晶在法向和正向上的生长,在卸载时阻碍了去孪晶过程

向上滑动阅览英文摘要

Due to easy activation of tensile twinning in Mg, multiple {10-12} twin variants can interact with each other and form twin-twin boundaries over the course of plastic deformation. Previous studies using 2-D settings provide only a partial understanding of these interactions, especially the non-cozone ones. Here, atomistic simulations are used to study the 3-D structural characteristic and evolution of the non-cozone {10-12} twin-twin junctions. The study reveals the existence of new twin-twin boundaries (TTBs) such as TTBBP and TTBK2, formed after the interaction between the basal prismatic and conjugate twin interfaces with the coherent twin boundary. For both non-cozone twin-twin interactions, the {-12-12} TTB and its associated twin-twin junctions are found to play a major role in the {10-12} twin's stability and mobility. Specifically, they promote the growth of the 3-D twin in both the normal and forward directions during the interaction and hinder the detwinning process upon unloading.

 

 

SCRIPTA

Vol. 200, 15 July. 2021, 113928

8. Yielding behavior of a single-crystalline γ'-strengthened Co-Ti-Cr superalloy

单晶γ'强化Co-Ti-Cr高温合金的屈服行为

 

A. Bezold, N. Volz, M. Lenz, C.H. Zenk, E. Spiecker, M. Mills, M. Göken, S. Neumeier

A. Bezold: andreas.bezold@fau.de

https://doi.org/10.1016/j.scriptamat.2021.113928

 

摘要

Ni3AlNi基高温合金的异常屈服行为可以用不可动位错构型来解释,这是由反相界耦合位错对的交滑移形成的。本文用透射电镜对单晶Co-11Ti-15Cr高温合金的反常屈服行为进行了系统研究,发现在屈服初期没有形成类似的不动位错构型。γ′析出相在峰值温度下的主要变形机制是超晶格层错的形成。此外,高密度的超晶格层错及其相互作用也导致了明显的加工硬化异常

向上滑动阅览英文摘要

The anomalous yielding behavior known from Ni3Al or Ni-base superalloys is explained by the formation of immobile dislocation configurations via cross-slip of the leading superpartial of anti-phase boundary-coupled dislocation pairs. A systematic investigation of the anomalous yielding behavior of a single-crystalline Co-11Ti-15Cr superalloy by transmission electron microscopy revealed the absence of similar sessile dislocation configurations during the initial yielding stage. Shearing of γ' precipitates via superlattice stacking fault formation is the dominant deformation mechanism at the peak temperature. Furthermore, the high density of superlattice stacking faults and their interactions also lead to a pronounced work-hardening anomaly.

 

 

SCRIPTA

Vol. 200, 15 July. 2021, 113923

9. New Ms-formula for exact microstructural prediction of modern 3rd generation AHSS chemistries

新的Ms公式可精确预测不同化学成分的第三代AHSS的微观组织

 

Simone Kaar, Katharina Steineder, Reinhold Schneider, Daniel Krizan, Christof Sommitsch

Simone Kaar: simone.kaar@fh-wels.at

https://doi.org/10.1016/j.scriptamat.2021.113923

 

摘要

对于第三代先进高强度钢(AHSS)来说,精确调整各个微观组织组成,特别是亚稳残余奥氏体(RA)的最佳体积分数是非常必要的。此外,避免在最终冷却时形成新鲜马氏体(α′)是至关重要的,否则将导致这些新钢种的力学性能发生明显恶化。因此,准确估算马氏体相变起始温度(Ms)对这组钢的建模和发展是至关重要的。在此背景下,本文基于第三代AHSS化学成分,提出了一个具有宽成分范围的Ms温度预测的新关系。此外,新的Ms公式可以精确预测极低和非常高C含量钢种的Ms温度,这是文献中已知的任何Ms公式所不能实现的

向上滑动阅览英文摘要

The exact adjustment of the individual microstructural constituents, in particular the optimum volume fraction of metastable retained austenite (RA), is imperative in case of the 3rd generation advanced high strength steels (AHSS). Moreover, it is of vital importance to avoid the formation of fresh martensite (α’) upon final cooling, otherwise the resulting mechanical properties of these novel steel grades will be pronouncedly deteriorated. Therefore, an accurate estimation of the martensite start (Ms) temperature is essential for modelling and development of this steel group. In this context, the present contribution proposes a new relation for the Ms temperature prediction with a remarkably wide composition range based on the 3rd generation AHSS chemistries. Moreover, the new Ms formula allows for an accurate determination of the Ms temperature for both, extremely low and very high C contents, which is not the case in any Ms formula known from literature.

 

 

SCRIPTA

Vol. 200, 15 July. 2021, 113927

10. Plastic deformation of solid-solution strengthened Hf-Nb-Ta-Ti-Zr body-centered cubic medium/high-entropy alloys

固溶强化Hf-Nb-Ta-Ti-Zr体心立方中/高熵合金的塑性变形

 

Rajeshwar R. Eleti, Nikita Stepanov, Nikita Yurchenko, Denis Klimenko, Sergey Zherebtsov

Rajeshwar R. Eleti: rajeshwar.eleti@gmail.com 

https://doi.org/10.1016/j.scriptamat.2021.113927

 

摘要

研究了不同体心立方(BCC)/高熵合金(MEAs/HEAs)300K拉伸变形过程中的塑性变形和速率控制机制。微观组织观察显示长而直的螺位错,偶尔由割阶组成。变形的亚结构与评估的激活体积(V*)一致,表明螺位错运动克服Peierls-Nabarro应力阻碍作为速率控制机制。V*值与屈服强度成反比。V*作为屈服强度函数的单调行为表明BCC-MEAs/HEAs的位错运动必须同时克服涉及多个/群置换溶质原子的能垒。此外,首次在BCC-MEAs/HEAs中观察到应力等效现象。研究结果描述了固溶强化BCC-MEAs/HEAs的热激活位错滑移机制取决于应力而不是合金的化学复杂性

向上滑动阅览英文摘要

Plastic deformation and rate-controlling mechanism during tensile deformation of various body-centered cubic (BCC) medium/high-entropy alloys (MEAs/HEAs) were investigated at 300 K. Microstructural observations revealed long, straight screw dislocations, occasionally consisting of jogs. The deformed substructures were consistent with the evaluated activation volume (V*) indicating screw dislocation motion overcoming the Peierls-Nabarro stress barrier as the rate-controlling mechanism. The V* values were found inversely proportional to the yield strength. The monotonous behavior of the V* as a function of yield strength indicated the dislocation motion of BCC-MEAs/HEAs must involve overcoming the energy barrier involving multiple/group of substitutional solute atoms, simultaneously. Furthermore, for the first time, stress equivalence was observed in the BCC-MEAs/HEAs. The findings described thermally-activated dislocation glide mechanisms of the solid-solution strengthened BCC-MEAs/HEAs depended on the stress rather than the chemical complexity of the alloys.

 

 

SCRIPTA

Vol. 200, 15 July. 2021, 113924

11. Pre-strain mediated fast natural aging in a dilute Mg-Zn-Ca-Sn-Mn alloy

预应变介导的Mg-Zn-Ca-Sn-Mn稀释合金的快速自然时效

 

Zhen-Ming Hua, Mei-Xuan Li, Cheng Wang, Xiao Shi, Zhao-Yuan Meng, Yi-Jia Li, Hai-Long Jia, Min Zha, Hui-Yuan Wang

Cheng Wang: chengwang@jlu.edu.cn  吉林大学

Hui-Yuan Wang: wanghuiyuan@jlu.edu.cn  吉林大学

https://doi.org/10.1016/j.scriptamat.2021.113924

 

摘要

稀释Mg-1.0Zn-0.45Ca-0.33Sn-0.2Mn (wt.%ZXTM1000)合金板材经预应变处理后,产生了显著的自然时效(NA)响应,在48小时内流应力从~138 MPa明显增加到了~163 MPa。预应变变形引入了大量基底为<a>的位错和过饱和非平衡空位,有利于溶质扩散过程,从而导致能量最小化的非均匀溶质分布。ZnCa原子的共偏析阻碍了位错运动,这是强化效应的主要原因。本工作揭示了在稀释镁合金中由于晶体缺陷的引入而出现的明显NA现象,同时也揭示了环境温度下相关的组织演变,为高性能低成本镁合金的设计提供了一种新的策略

向上滑动阅览英文摘要

A remarkable natural aging (NA) hardening response induced by pre-strain treatment, i.e. an evident increment of flow stress from ~138 MPa to ~163 MPa within only 48h, was observed in a dilute Mg-1.0Zn-0.45Ca-0.33Sn-0.2Mn (wt.%, ZXTM1000) alloy sheet. The pre-strain deformation introduces profuse basal <a> dislocations and supersaturated non-equilibrium vacancies, favoring the solute diffusion process and therefore resulting in a heterogeneous solute distribution for energy minimization. The retarded dislocation movement by co-segregation of Zn and Ca atoms is responsible for the strengthening effect. This work sheds light on the appreciable NA phenomenon previously unexpected in dilute Mg alloys assisted by the introduction of crystal defects, and the associated microstructure evolutions at ambient temperature provide a novel strategy for the design of high-performance low-cost Mg alloys.