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金属顶刊双语导读丨Scripta Mater. Vol.203, 1 Oct. 2021（上）

2021-08-08 来源：Goal Science

 

本期包含金属材料领域论文10篇，涵盖了马氏体、中熵合金等，国内科研单位包括西安交通大学、燕山大学、上海交通大学、浙江大学等（通讯作者单位）。

 

Vol. 203 目录

1. A high-strength heat-resistant Al−5.7Ni eutectic alloy with spherical Al3Ni nano-particles by selective laser melting

激光选区熔化制备含球形Al3Ni纳米颗粒的高强度耐热Al-5.7Ni共晶合金

 

2. Ferroelectric-relaxor boundary in La-modified Pb(Mg1/3Nb2/3)O3-xPbTiO3 crossover showing enhanced dielectric and piezoelectric properties

La改性的 Pb(Mg1/3Nb2/3)O3-xPbTiO3中的铁电-弛豫边界显示增强的介电和压电性能

 

3. Revealing atomic-scale vacancy-solute interaction in nickel

揭示镍中原子级空位-溶质的相互作用

 

4. Effect of geometric lath orientation on fatigue crack propagation via out-of-plane dislocation glide in martensitic steel

几何板条取向对马氏体钢中平面外位错滑移所引起的疲劳裂纹扩展的影响

 

5. HfB2 ceramic polycrystals: A low-temperature metal-like ceramic at high temperatures?

HfB2多晶陶瓷：高温下的低温金属状陶瓷？

 

6. Anisotropic nitriding behavior upon formation of expanded hcp in Co-Cr alloys

在Co-Cr合金中形成膨胀hcp时的各向异性渗氮行为

 

7. Stress-dependent incipient plasticity of a face-centered-cubic-based Al0.3CoCrFeNi multi-principal element alloy with nano-scaled phase separation

具有纳米级相分离的面心立方基Al0.3CoCrFeNi多主元素合金的应力相关初始塑性

 

8. Enhanced defect annihilation capability of the graphene/copper interface: An in situ study

石墨烯/铜界面增强的缺陷消除能力：原位研究

 

9. Fluence-dependent microstructure and nanomechanical property in Co-Ni-V medium entropy alloy thin films

Co-Ni-V中熵合金薄膜中的通量相关微观组织和纳米力学性能

 

10. In-situ TEM investigation of unfaulting behavior of Frank loops in FCC Pd during H2+ & He+ dual-beam irradiation

H2+和He+双光束辐照时Frank环在FCC Pd中的无故障行为的原位TEM研究

 

 

SCRIPTA

Vol. 203, 1 Oct. 2021, 114034

1. A high-strength heat-resistant Al−5.7Ni eutectic alloy with spherical Al3Ni nano-particles by selective laser melting

激光选区熔化制备含球形Al3Ni纳米颗粒的高强度耐热Al-5.7Ni共晶合金

 

Junwang Deng, Chao Chen✉, Xiaochun Liu✉, Yunping Li, Kechao Zhou, Shengmin Guo

Chao Chen: pkhqchenchao@126.com, 中南大学

Xiaochun Liu: xcliu@csust.edu.cn, 长沙理工大学

https://doi.org/10.1016/j.scriptamat.2021.114034

 

摘要

传统的高强度锻造铝合金对增材制造 (AM) 过程中产生的裂纹敏感，而共晶铝合金能够很好地进行打印。 为了探索AM制备的高强度耐热铝合金，在本文中，我们提出通过使用Al-5.7Ni合金来延迟凝固范围，从而减轻裂纹形成趋势。该合金AM部分的特征是均匀分布的球形 Al3Ni 纳米颗粒，平均尺寸约为33 nm。它们与基体呈现出新的共格晶体学关系：<110>Al//<113>Al3Ni和{111}Al//{211}Al3Ni。这种无裂纹合金具有优异的机械性能，室温拉伸强度为 410 MPa，300°C拉伸强度为 140 MPa，这主要归功于弥散强化的Al3Ni纳米颗粒具有优异热稳定性。

向上滑动阅览英文摘要

Traditional high-strength wrought aluminum alloys are sensitive to cracks in additive manufacturing (AM) while the eutectic aluminum alloys can be reliably printed. To explore a high-strength heat-resistant aluminum alloys by AM, in this paper, we proposed to retard the solidification range by using an Al−5.7Ni alloy, thus alleviate crack formation tendency. The AM parts of this alloy was featured by uniformly distributed spherical Al3Ni nano-particles with an average size of ~33 nm, showing a novel coherent crystallographic relationship with the matrix, <110>Al//<113>Al3Ni and {111}Al//{211}Al3Ni. Excellent mechanical property was achieved in this crack-free alloy with tensile strength of 410 MPa at room temperature and 140 MPa at 300°C, mainly attributed to the dispersion strengthening from the Al3Ni nano-particles with superior thermal stability.

 

 

SCRIPTA

Vol. 203, 1 Oct. 2021, 114042

2. Ferroelectric-relaxor boundary in La-modified Pb(Mg1/3Nb2/3)O3-xPbTiO3 crossover showing enhanced dielectric and piezoelectric properties

La改性的 Pb(Mg1/3Nb2/3)O3-xPbTiO3中的铁电-弛豫边界显示增强的介电和压电性能

 

Yang Yang✉, Andong Xiao, Jiantuo Zhao✉, Xiaobing Ren

Yang Yang: yangyangz@xjtu.edu.cn, 西安交通大学

Jiantuo Zhao: jtzhao@xjtu.edu.cn, 西安交通大学

https://doi.org/10.1016/j.scriptamat.2021.114042

 

摘要

系统研究了La改性的Pb(Mg1/3Nb2/3)O3-xPbTiO3交叉陶瓷的介电和压电性能。在渗透区域，有一个铁电-弛豫边界将铁电态和弛豫态分开，这是由随着温度降低从弛豫到铁电态的自发跃迁决定的。在铁电-弛豫边界处，与相邻铁电体相比，最大介电常数从18,200增加到23,500，压电系数 (d33) 从300 pC/N 增加到450 pC/N，同时电应变从0.09%提高到0.12%。这些增强可能源于自发转变的存在以及宏观域和极性纳米域配置的共存引起的极化旋转的低能垒。这项工作表明交叉区域的铁电-弛豫边界可能成为提高铁电材料介电和压电性能的有效途径。

向上滑动阅览英文摘要

The dielectric and piezoelectric properties of La-modified Pb(Mg1/3Nb2/3)O3-xPbTiO3 crossover ceramics were systematically studied. In this crossover region, there is a ferroelectric-relaxor boundary separating the ferroelectric and relaxor states, which is determined by the spontaneous transition from relaxor to ferroelectric state with decreasing temperature. At the ferroelectric-relaxor boundary, the maximum permittivity increases from 18,200 to 23,500, and piezoelectric coefficient (d33) increases from 300 pC/N to 450 pC/N accompanied by the electrostrain improved from 0.09% to 0.12%, as compared with adjacent ferroelectric specimen. These enhancements may originate from the low energy barrier for polarization rotation induced by the existence of spontaneous transition and the coexistence of macrodomain and polar nanodomain configuration. This work indicates that the ferroelectric-relaxor boundary in crossover region may become an effective approach to enhance the dielectric and piezoelectric properties of ferroelectric materials.

 

 

SCRIPTA

Vol. 203, 1 Oct. 2021, 114036

3. Revealing atomic-scale vacancy-solute interaction in nickel

揭示镍中原子级空位-溶质的相互作用

 

Felipe F. Morgado✉, Shyam Katnagallu, Christoph Freysoldt, Benjamin Klaes, François Vurpillot, Jörg Neugebauer, Dierk Raabe, Steffen Neumeier, Baptiste Gault✉, Leigh T. Stephenson✉

Felipe F. Morgado: f.ferraz@mpie.de

Baptiste Gault: b.gault@mpie.de

Leigh T. Stephenson: l.stephenson@mpie.de

https://doi.org/10.1016/j.scriptamat.2021.114036

 

摘要

人们普遍认为，不同类型的晶体缺陷，例如空位或位错，会极大地影响材料的物理和机械性能。然而，对固体中的单个空位进行成像并揭示它们的原子邻域仍然是显微镜和微观分析的前沿之一。在这里，我们研究了蠕变变形的二元Ni-2 at.% Ta合金。原子探针断层扫描显示 Ta的随机分布。场离子显微镜，在密度泛函理论和飞行时间质谱法的对比解释下，证明了Ta与空位的正相关，支持了先前由原子模拟预测的正溶质空位相互作用。

向上滑动阅览英文摘要

It is widely accepted that the different types of crystalline imperfections, such as vacancies or dislocations, greatly influence a material's physical and mechanical properties. However, imaging individual vacancies in solids and revealing their atomic neighborhood remains one of the frontiers of microscopy and microanalysis. Here, we study a creep-deformed binary Ni-2 at.% Ta alloy. Atom probe tomography reveals a random distribution of Ta. Field ion microscopy, with contrast interpretation supported by density-functional theory and time-of-flight mass spectrometry, evidences a positive correlation of Ta with vacancies, supporting positive solute-vacancy interactions previously predicted by atomistic simulations.

 

 

SCRIPTA

Vol. 203, 1 Oct. 2021, 114045

4. Effect of geometric lath orientation on fatigue crack propagation via out-of-plane dislocation glide in martensitic steel

几何板条取向对马氏体钢中平面外位错滑移所引起的疲劳裂纹扩展的影响

 

Shohei Ueki, Yoji Mine✉, Xinyu Lu, Yu Lung Chiu, Paul Bowen, Kazuki Takashima

Yoji Mine: mine@msre.kumamoto-u.ac.jp

https://doi.org/10.1016/j.scriptamat.2021.114045

 

摘要

使用三维电子背散射衍射 (3D-EBSD) 技术检测中碳钢马氏体板条疲劳裂纹尖端前的应变累积。本研究的目的是解释由于平面外滑移激活而导致的裂纹扩展机制，其Burgers矢量没有裂纹扩展方向的分量，对疲劳裂纹扩展具有很高的抵抗力。3D-EBSD分析显示晶体中几乎没有取向差，同时粗板条中的疲劳裂纹扩展有利于在其纵向方向上的位错滑动。这表明这些板条有助于应变调节。相反，应变优先累积在不利于纵向滑动的粗板条中，促进裂纹扩展。这表明马氏体板条的几何各向异性和分布支配着马氏体碳钢的疲劳裂纹扩展阻力。

向上滑动阅览英文摘要

Strain accumulation ahead of the fatigue crack tip in the martensite lath of a medium-carbon steel was examined using a three-dimensional electron backscatter diffraction (3D-EBSD) technique. The objective of this study is to explain the crack propagation mechanism due to the activation of out-of-plane slips with their Burgers vectors having no component of the crack growth direction, which exhibits high resistance to fatigue crack growth. The 3D-EBSD analysis revealed little misorientation in the crystal, concurrent with the fatigue crack propagation in the coarse laths oriented favourably for dislocation glide in their longitudinal directions. This suggests that these laths contributed to strain accommodation. In contrast, strain preferentially accumulated in the coarse laths oriented unfavorably for the longitudinal slip, promoting crack propagation. These indicate that the geometrical anisotropy and distribution of martensite laths dominate the fatigue crack propagation resistance in martensitic carbon steel.

 

 

SCRIPTA

Vol. 203, 1 Oct. 2021, 114037

5. HfB2 ceramic polycrystals: A low-temperature metal-like ceramic at high temperatures?

HfB2多晶陶瓷：高温下的低温金属状陶瓷？

 

Eugenio Zapata-Solvas, Bibi Malmal Moshtaghioun, Diego Gomez-Garcia✉, Arturo Dominguez-Rodriguez, William E. Lee

Diego Gomez-Garcia: dgomez@us.es

https://doi.org/10.1016/j.scriptamat.2021.114037

 

摘要

二硼化铪(HfB2)是一种耐高温（在3000°C以上熔化）陶瓷，在高温下具有许多潜在的应用。 为了使其能够在特定温度下长时间使用，必须了解其高温可塑性。本文研究了在900°C和 2000°C 之间的温度下，在空气和还原性气氛中的机械响应，解释了低温下紧凑包装金属塑性的经典模型框架中的数据。特别是，评估了弗里德尔定律和位错模式的相似性原则。这表明HfB2是具有“金属”机械性能的陶瓷材料的一个独特例子。

向上滑动阅览英文摘要

Hafnium diboride (HfB2) is a highly refractory (melting above 3000°C) ceramic with many potential applications at high temperatures. To enable its use at temperature for extended periods its high-temperature plasticity must be known. This paper examines the mechanical response at temperatures between 900°C and 2000°C in air and in a reducing atmosphere, interpreting the data in the frame of classical models for the plasticity of compact-packed metals at low temperatures. In particular, the Friedel law and the principle of similitude for dislocation patterning are assessed. This reveals that HfB2 is a singular example of a ceramic material with “metal” mechanical behaviour.

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SCRIPTA

Vol. 203, 1 Oct. 2021, 114041

6. Anisotropic nitriding behavior upon formation of expanded hcp in Co-Cr alloys

在Co-Cr合金中形成膨胀hcp时的各向异性渗氮行为

 

Maryam Akhlaghi✉, Stenfan Martin, Johannes Dallman, Rainer Hock, Carolin Korner, Andreas Leineweber

Maryam Akhlaghi: maryam.akhlaghi@fau.de

https://doi.org/10.1016/j.scriptamat.2021.114041

 

摘要

本文研究了具有初始hcp晶体结构的Co-Cr合金在气态氮化后从六方密堆积(hcp)到面心立方 (fcc)晶体结构的转变。在400°C低温渗氮的早期阶段，X射线衍射图中hcp基板反射的低角度侧的新反射可归因于hcp相的形成及表面的晶格膨胀。长时间的氮化处理和在较高温度下的氮化会导致这种膨胀的hcp转变为膨胀的fcc。上述所观察到的各项异性转变发生在不同取向的hcp 晶粒上。相对于渗氮方向，基面滑移模式的最高施密德因子在hcp方向上的转变较慢。这是从渗氮早期发展的宏观应力及其对hcp变体塑性各向异性变形的影响的角度进行讨论的。

向上滑动阅览英文摘要

The transformation from hexagonal close packed (hcp) to face-centered cubic (fcc) crystal structure upon gaseous nitriding of Co-Cr alloy with initial hcp crystal structure was investigated. During early stages of low-temperature nitriding at 400°C, new reflections on the low-angle side of the hcp-substrate reflections in X-ray diffraction patterns can be attributed to the formation of hcp phase with an expanded lattice on the surface. Prolonged nitriding treatment and nitriding at higher temperatures result in transformation of this expanded hcp into an expanded fcc. An anisotropic progress of mentioned transformation on differently-oriented hcp crystallites is observed. The transformation is slower in hcp orientations with the highest Schmid factor of the basal slip mode with respect to the nitriding direction. This is discussed in a view of developed macrostress in early stages of nitriding and its influence on plastic anisotropic deformation of hcp variants.

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SCRIPTA

Vol. 203, 1 Oct. 2021, 114053

7. Stress-dependent incipient plasticity of a face-centered-cubic-based Al0.3CoCrFeNi multi-principal element alloy with nano-scaled phase separation

具有纳米级相分离的面心立方基Al0.3CoCrFeNi多主元素合金的应力相关初始塑性

 

L.J. Zhang, P.F. Yu, C.Z. Zhang, J.T. Fan, G. Li✉

G. Li: gongli@ysu.edu.cn, 燕山大学

https://doi.org/10.1016/j.scriptamat.2021.114053

 

摘要

通过测量具有纳米级相分离的面心立方Al0.3CoCrFeNi多主元素合金中的第一次弹出行为来探测应力相关的初始塑性。大量压痕测量表明，最大剪切应力的双峰分布的操作与不同的位错成核位点有关。这种双峰分布现象可用于表征合金的结构异质性。计算活化体积和位错成核率以进一步研究不同的位错成核机制。

向上滑动阅览英文摘要

The stress-dependent incipient plasticity was probed by measuring the first pop-in behavior in a face-centered-cubic-based Al0.3CoCrFeNi multi-principal element alloy with nano-scaled phase separation. A large number of indentation measurements revealed that the operation of a bimodal distribution for the maximum shear stress was associated with different dislocation nucleation sites. This bimodal distribution phenomenon can be used to characterize the structural heterogeneity of the alloy. The activation volume and the dislocation nucleation rate were calculated to make a further investigation to the different dislocation nucleation mechanisms.

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SCRIPTA

Vol. 203, 1 Oct. 2021, 114001

8. Enhanced defect annihilation capability of the graphene/copper interface: An in situ study

石墨烯/铜界面增强的缺陷消除能力：原位研究

 

K.M. Yang, P.Z. Tang, Q. Zhang, H.Y. Ma, E.Q. Liu, M. Li, X. Zhang, Jin Li✉ ,Y. Liu, T.X. Fan✉

Jin Li: lijin2019@hit.edu.cn, 哈尔滨工业大学（深圳校区）

T.X. Fan: txfan@sjtu.edu.cn, 上海交通大学

https://doi.org/10.1016/j.scriptamat.2021.114001

 

摘要

众所周知，高能重离子辐射通常会引起缺陷并最终导致材料降解。界面，例如大角度晶界（HAGB），通常用作缺陷吸收处以减轻辐射损伤。然而，HAGB在辐射过程中通常是不稳定的。 在这里，我们通过在透射电子显微镜下使用原位Kr++离子辐照来研究石墨烯(Gr)/Cu复合材料的界面辐照响应。结果表明，与Cu中的HAGB相比，Gr/Cu界面表现出更高的缺陷湮灭能力。此外，原子模拟表明Gr/Cu界面的应力场范围略高和较大，这有助于增强缺陷吸收能力。目前的发现对于理解和设计具有优异辐照耐受性的新型碳/金属复合材料至关重要。

向上滑动阅览英文摘要

It is well known that energetic heavy ion irradiations can often induce defects and ultimately lead to material degradations. Interfaces, such as high-angle grain boundaries (HAGBs), are generally used as defect sinks for alleviating the irradiation damage. However, HAGBs are often unstable during radiation. Here we investigate the interfacial irradiation responses of the graphene (Gr)/Cu composites by using in situ Kr++ ions irradiation under transmission electron microscopy. The results revealed that the Gr/Cu interface exhibits higher defect annihilation capability compared to the HAGBs in Cu. Moreover, the atomistic simulations suggested a slightly higher and larger range of stress field for the Gr/Cu interface, which contributes to the enhanced defects absorption capability. The present findings are essential to understand and design a new class of carbon/metal composites with superior irradiation tolerance.

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SCRIPTA

Vol. 203, 1 Oct. 2021, 114050

9. Fluence-dependent microstructure and nanomechanical property in Co-Ni-V medium entropy alloy thin films

Co-Ni-V中熵合金薄膜中的通量相关微观组织和纳米力学性能

 

Min Hu, Qingping Cao✉, Xiaodong Wang, Dongxian Zhang, Jian-Zhong Jiang✉

Qingping Cao: caoqp@zju.edu.cn, 浙江大学

Jian-Zhong Jiang: jiangjz@zju.edu.cn, 浙江大学

https://doi.org/10.1016/j.scriptamat.2021.114050

 

摘要

通过调节沉积功率，合成了一系列以纳米柱状方式生长的具有不同微观组织和形貌的 Co-Ni-V中熵合金薄膜。随着通量的增加，结晶度和纳米柱的尺寸都经历了先增加然后减少的过程，这受吸附原子表面扩散与沉积速率竞争的控制。同时，能流的连续强化归因于低注量下的结合改善和边界的减少以及高注量范围内的非晶化强化作用。

向上滑动阅览英文摘要

Via tuning deposition power, a series of Co-Ni-V medium entropy alloy thin films, growing in a nanocolumn manner, with different microstructures and morphologies were synthesized. With increasing fluence, both the crystallinity and nanocolumn size experienced a process of first increasing and then decreasing, controlled by the adatom surface diffusion vs. deposition rate competition. Meanwhile, continuous strengthening with fluence was ascribed to improved bonding and reduced fraction of boundary at low fluence and amorphization reinforcement effect in high fluence range.

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SCRIPTA

Vol. 203, 1 Oct. 2021, 114047

10. In-situ TEM investigation of unfaulting behavior of Frank loops in FCC Pd during H2+ & He+ dual-beam irradiation

H2+和He+双光束辐照时Frank环在FCC Pd中的无故障行为的原位TEM研究

 

Yipeng Li, Guang Ran✉, Qing Han, Yong Xin, Xinyi Liu, Xiaoqiu Ye

Guang Ran: gran@xmu.edu.cn, 厦门大学，福建核工程研究中心

https://doi.org/10.1016/j.scriptamat.2021.114047

 

摘要

在塑性变形、淬火或粒子照射下，有缺陷的弗兰克位错环 (FDL) 可以转变为无故障的完美位错环 (PDL)。在这里，我们报告了通过透射电子显微镜中的原位离子辐照对钯 (Pd) 中 FDL的无缺陷过程的直接观察。 结果表明，FDL的无缺陷过程是三个过程的组合，涉及相邻FDL之间的相互作用、FDL和PDL之间的相互作用以及FDL内Shockley部分位错的形核和生长。同时，气泡倾向于在位错环内成核，PDLs比 FDLs捕获更多的He/H2，这首次证实了辐照诱导的环在Pd的老化中起着重要作用，并且无缺陷加强了这一过程。

向上滑动阅览英文摘要

A faulted Frank dislocation loop (FDL) can transform into an unfaulted perfect dislocation loop (PDL) under plastic deformation, quenching or particle irradiation. Here, we report our direct observation of the unfaulting processes of FDLs in palladium (Pd) by in-situ ion irradiation in transmission electron microscopy. Results indicate that the FDL unfaulting is a combination of three processes involving the interaction between adjacent FDLs, the interaction between FDL and PDL, and the nucleation and growth of Shockley partial dislocations within FDL. Meanwhile, bubbles tend to nucleate within dislocation loops, and the PDLs capture more He/H2 over FDLs, which confirms for the first time that the irradiation-induced loops play an important role in the aging of Pd and the unfaulting strengthens this process.

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