金属顶刊双语导读丨Scripta Mater. Vol.202, 1 Sep. 2021（下）_格尔赛斯

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金属顶刊双语导读丨Scripta Mater. Vol.202, 1 Sep. 2021（下）

2021-08-08 来源：Goal Science

本期包含金属材料领域论文8篇，涵盖了高熵合金、不锈钢、中熵合金等，国内科研单位包括四川大学等（通讯作者单位）。

Vol. 202 目录

1. Fracture toughness of 304L austenitic stainless steel produced by laser powder bed fusion

激光粉末床熔合法制备的304L奥氏体不锈钢的断裂韧性

2. Unveiling the thermodynamic driving forces for high entropy alloys formation through big data ab initio analysis

通过大数据从头计算分析揭示高熵合金形成的热力学驱动力

3. Cu precipitation-mediated formation of reverted austenite during ageing of a 15-5 PH stainless steel

15-5 PH不锈钢时效过程中Cu析出介导的逆转变奥氏体的形成

4. Low-temperature oxy-nitriding of 316 L austenitic stainless steel for improved corrosion resistance in liquid lead-bismuth eutectic

316L奥氏体不锈钢的低温氧氮化提高其在液态铅铋共晶中的耐蚀性

5. Simultaneous effects of deformation-induced plasticity and precipitation hardening in metastable non-equiatomic FeNiCoMnTiSi ferrous medium-entropy alloy at room and liquid nitrogen temperatures

在室温和液氮温度下亚稳态非等原子FeNiCoMnTiSi铁基中熵合金的变形诱导塑性和沉淀硬化的同步效应

6. A new insight into annealing parameters in tailoring the mechanical properties of a medium Mn steel

调控中锰钢力学性能的退火参数的新见解

7. Understanding ferrite deformation caused by austenite to martensite transformation in dual phase steels

理解双相钢中奥氏体向马氏体转变引起的铁素体变形

8. The effects of interstitial hydrogen and carbon atoms and aging temperature on annihilation behavior of hydrogen-enhanced strain-induced vacancies in iron

间隙氢和碳原子以及时效温度对铁中氢增强应变诱导空位的湮没行为的影响

SCRIPTA

Vol. 202, 1 Sep. 2021, 114002

1. Fracture toughness of 304L austenitic stainless steel produced by laser powder bed fusion

激光粉末床熔合法制备的304L奥氏体不锈钢的断裂韧性

Punit Kumar✉, Zhiguang Zhu, Sharon M.L. Nai, R.L. Narayan, U. Ramamurty

Punit Kumar: punit.kumar@ntu.edu.sg

https://doi.org/10.1016/j.scriptamat.2021.114002

摘要

研究了激光粉末床熔合法(LPBF)制备的304L奥氏体不锈钢的单轴拉伸响应和J积分阻力行为。钢在室温下经历相变诱导塑性(TRIP)，产生高的断裂韧性(J_Q)值以及高的强度(σ_Y)和塑性。当温度升高到75℃时，TRIP变得不活跃，变形机制以位错滑移和孪晶为主。这导致了J_Q的大幅降低和明显的各向异性，而σ_Y则保持不变。本文讨论了这些结果在LPBF工艺制备的钢的断裂性能方面的意义。

向上滑动阅览英文摘要

Uniaxial tensile response and J integral-resistance behavior of 304L austenitic stainless steel manufactured by laser powder bed fusion process (LPBF) were investigated. The steel undergoes transformation induced plasticity (TRIP) at room temperature, resulting in high fracture toughness (J_Q) values combined with high strength (σ_Y) and ductility. Upon increasing the temperature to 75°C, TRIP becomes inactive, and the deformation mechanism is dominated by dislocation glide and twinning. This leads to a substantial reduction in J_Q and marked anisotropy, while σ_Y remains unchanged. Significance of these results in terms of fracture properties of steels manufactured via LPBF processes is discussed.

SCRIPTA

Vol. 202, 1 Sep. 2021, 114000

2. Unveiling the thermodynamic driving forces for high entropy alloys formation through big data ab initio analysis

通过大数据从头计算分析揭示高熵合金形成的热力学驱动力

G. B. Bokas, W. Chen, A. Hilhorst, P.J. Jacques, S. Gorsse, G. Hautier✉

G. Hautier: geoffroy.hautier@dartmouth.edu

https://doi.org/10.1016/j.scriptamat.2021.114000

摘要

目前对于高熵合金(HEAs)存在之外的基本热力学驱动力仍然没有充分的了解。本文利用热力学模型结合从头计算和正规溶液模型，建立了一个超过10万、由27种常见元素形成的BCC和FCC等摩尔合金的数据库。我们用统计的方法研究了随机固溶体中焓和熵的贡献随着元素数目的变化是如何演变的。由于随着元素数目的增加熵的重要性也在增加，普遍认为的HEAs稳定的合理化是有些矛盾的。熵和焓的贡献有利于混合，但随着合金中元素数目的增加，这两种驱动力都减弱。通过将二元金属间化合物添加到我们的分析中，可以得出结论，容易形成单相HEAs的特定化学成分需要在给定晶格上结合有利焓的元素混合，而不存在强竞争的金属间化合物。

向上滑动阅览英文摘要

The fundamental thermodynamic driving forces beyond the existence of high entropy alloys (HEAs) are still not firmly understood. Here, using thermodynamic modeling combining ab initio computations with a regular solution model, we build a database of more than 100,000 BCC and FCC equimolar alloys formed using 27 common elements. We statistically study how enthalpic and entropic contributions evolve with the number of elements in a random solid solution. The commonly admitted rationalization of a stabilization of HEAs due to a growing importance of the entropy with the number of elements is somewhat contradicted. Entropic and enthalpic contributions favor mixing in average, but both driving forces weaken as the number of elements in the alloy increases. By adding binary intermetallics to our analysis, we conclude that the specific chemical compositions prone to form single phase HEAs need to combine an enthalpically favorable mixing of their elements on a given lattice with the absence of strongly competing intermetallics.

SCRIPTA

Vol. 202, 1 Sep. 2021, 114007

3. Cu precipitation-mediated formation of reverted austenite during ageing of a 15-5 PH stainless steel

15-5 PH不锈钢时效过程中Cu析出介导的逆转变奥氏体的形成

Tao Zhou✉, Benjamin Neding, Sen Lin, Jo-Chi Tseng, Peter Hedström

Tao Zhou: taozhou@kth.se

https://doi.org/10.1016/j.scriptamat.2021.114007

摘要

通过原子探针断层扫描、原位同步X射线衍射和计算热力学和动力学，揭示了15-5 PH不锈钢时效处理过程中Cu沉淀介导的奥氏体相变。奥氏体转变是通过以下路径发生的：Cu在马氏体/残余奥氏体界面或马氏体板条界面析出→奥氏体稳定元素向Cu析出界面配分→逆转变奥氏体形成。

向上滑动阅览英文摘要

A Cu precipitation-mediated austenitic transformation during ageing treatment of a 15-5 PH stainless steel is revealed through atom probe tomography, in situ synchrotron X-ray diffraction and computational thermodynamics and kinetics. The austenitic transformation is proposed to occur through the pathway: Cu precipitation at the martensite/retained austenite interfaces or at martensite lath boundaries→partitioning of austenite stabilizing elements towards interfaces of the Cu precipitates→reverted austenite formation.

SCRIPTA

Vol. 202, 1 Sep. 2021, 114014

4. Low-temperature oxy-nitriding of 316 L austenitic stainless steel for improved corrosion resistance in liquid lead-bismuth eutectic

316L奥氏体不锈钢的低温氧氮化提高其在液态铅铋共晶中的耐蚀性

Guang Chen, Jun Wang✉, Hongtao Zhang, Longyi Li, Hongyuan Fan

Jun Wang: srwangjun@scu.edu.cn 四川大学

https://doi.org/10.1016/j.scriptamat.2021.114014

摘要

研究了316L ASS在823K真空滞留液铅铋共晶中低温氧氮化(LTON)处理对LBE腐蚀行为的影响。结果表明，未处理样品在液态LBE接触下存在严重的选择性浸出。LTON处理在试样表面形成了一层Fe-Cr尖晶石多孔外膜和一层S相内膜，在LBE溶液腐蚀后形成了一层较厚的含有γ_low-N的尖晶石膜和分布有CrN析出的区域。这主要是由于S相是亚稳态相，在高温下比基体更容易被氧化，导致S相的氧化和分解以及间隙原子的向内扩散。这启发我们，提高材料形成保护性氧化膜的能力可能是缓解液态LBE腐蚀的一个好方法。

向上滑动阅览英文摘要

The effects of low-temperature oxy-nitriding (LTON) treatment on the liquid lead-bismuth eutectic (LBE) corrosion behaviors of 316 L ASS were investigated in the stagnant liquid LBE under vacuum at 823 K. Results show that the untreated samples were severely selective leaching in contact with liquid LBE. LTON treatment produced an outer porous Fe-Cr spinel film and inner S phase layer on the sample surface, which transformed into a thicker spinel film containing γ_low-N and a region distributed with CrN precipitates after liquid LBE corrosion. This was mainly attributed to the oxidation and decomposition of S phase and inward diffusion of the interstitials, owing to S phase is a metastable phase and is easier to be oxidized than matrix at elevated temperatures. This inspired us that improving the ability to form protective oxide film for materials was maybe a good method to mitigate the liquid LBE corrosion.

SCRIPTA

Vol. 202, 1 Sep. 2021, 114013

在室温和液氮温度下亚稳态非等原子FeNiCoMnTiSi铁基中熵合金的变形诱导塑性和沉淀硬化的同步效应

Farahnaz Haftlang, Peyman Asghari-Rad, Jongun Moon, Alireza Zargaran, Kee-Ahn Lee, Soon-Jik Hong, Hyoung Seop Kim✉

Hyoung Seop Kim: hskim@postech.ac.kr

https://doi.org/10.1016/j.scriptamat.2021.114013

摘要

本文研究了一种新型亚稳态65Fe-15Ni-8Co-8Mn-3Ti-Si (at%)铁基中熵合金在298 K和77 K下的力学性能。采用短时间退火后的时效处理，获得了由纳米析出相装饰的细晶粒和粗晶粒组成的非均质组织。时效处理后，合金的屈服强度从298K和77K时的0.9 GPa和1.3 GPa显著提高到1.1 GPa和1.5 GPa，而总延伸率保持在20%以上。这种显著的改善是由于时效合金在拉伸变形过程中异质变形诱导强化、力学纳米孪晶、马氏体相变以及均匀分布的纳米级Fe₂SiTi和Ni₃Ti析出强化的协同效应。因此，相应的铁基MEA可以被认为是在极端服役条件下超高强度部件的一种有前途的候选材料。

向上滑动阅览英文摘要

In the present work, the mechanical properties of a newly developed metastable 65Fe-15Ni-8Co-8Mn-3Ti-Si (at%) ferrous medium-entropy alloy were investigated at 298 K and 77 K. The short-time annealing followed by aging treatment is employed to gain heterogeneous microstructure containing fine- and coarse-grains decorated with nanometric precipitates. The yield strength of the alloy enhances substantially from 0.9 GPa at 298 K and 1.3 GPa at 77 K in the annealed state, respectively, to 1.1 GPa and 1.5 GPa after the aging treatment, while the total elongation sustains more than 20%. This extraordinary improvement results from the synergistic effect of hetero-deformation-induced strengthening, mechanical nano-twins, and martensitic phase transformation along with precipitation strengthening of the well-distributed nano-scale Fe₂SiTi and Ni₃Ti precipitates during tensile deformation of the aged alloy. Therefore, the corresponding ferrous MEA can be considered as a promising candidate for ultra-high-strength components at extreme service conditions.

SCRIPTA

Vol. 202, 1 Sep. 2021, 114019

6. A new insight into annealing parameters in tailoring the mechanical properties of a medium Mn steel

调控中锰钢力学性能的退火参数的新见解

Songyang Jing, Hua Ding✉, Yuping Ren, Zhihui Cai

Hua Ding: dingh@smm.neu.edu.cn 东北大学

https://doi.org/10.1016/j.scriptamat.2021.114019

摘要

中锰钢的力学性能一般是通过调节临界退火(IA)温度和退火时间来实现的。然而，在本研究中，我们发现IA中的升温过程对所研究中锰钢的力学性能也有显著的控制作用。不同温度下，升温周期越长，越有利于奥氏体晶粒的形成，从而使得在单个奥氏体晶粒内和不同奥氏体晶粒间的Mn元素分布更加不均匀。这种非均质组织导致了奥氏体板条之间屈服强度的差异和较慢的应变诱导马氏体相变动力学。最终，在保持高的极限抗拉强度的同时，所研究的中锰钢的屈服强度和总延伸率显著提高。本研究为全面理解退火参数的影响提供了新的见解，以提高中锰钢的力学性能。

向上滑动阅览英文摘要

Generally, the mechanical properties of medium Mn steels are mainly tailored by adjusting temperature and duration of intercritical annealing (IA). However, in the present study, it is found that the temperature-rise-period in IA also plays a remarkable role in the control of the mechanical properties of the investigated medium Mn steel. A longer temperature-rise-period is conducive to the formation of austenite grains at different temperatures, resulting in more heterogeneous distribution of Mn element within an individual austenite grain and among different austenite grains. This heterogeneous microstructure leads to the difference in the yield strength among austenite laths and a slow strain-induced-martensite-transformation kinetics. Eventually, the yield strength and total elongation of the investigated steel has been significantly increased while high ultimate tensile strength is maintained. This study provides a new insight into comprehensively understanding the role of annealing parameters so as to improve the mechanical properties of medium Mn steels in industrial production.

SCRIPTA

Vol. 202, 1 Sep. 2021, 114032

7. Understanding ferrite deformation caused by austenite to martensite transformation in dual phase steels

理解双相钢中奥氏体向马氏体转变引起的铁素体变形

Vibhor Atreya✉, Cornelis Bos, Maria J. Santofimia

Vibhor Atreya: V.Atreya@tudelft.nl

https://doi.org/10.1016/j.scriptamat.2021.114032

摘要

在DP钢生产过程中，奥氏体向马氏体转变时伴随的体积膨胀和形状变化可以被周围铁素体晶粒的变形所适应。铁素体晶粒的变形程度最终影响DP钢的力学性能。利用电子背散射衍射，本研究确定了控制相变诱导铁素体晶粒变形程度的马氏体特征。研究发现，小奥氏体晶粒易于转变为与相邻铁素体晶粒成密排平面平行关系的马氏体变体，从而实现相对容易的滑移传递，导致铁素体晶粒的长程变形。铁素体晶粒也表现出限制于铁素体/马氏体界面附近的短程变形，这主要受马氏体碳含量的影响。

向上滑动阅览英文摘要

During the production of DP steels, the volume expansion and shape change accompanying the austenite to martensite transformation is accommodated by the deformation of surrounding ferrite grains. The extent of the deformation in ferrite grains ultimately affects the mechanical properties of DP steels. Using electron backscatter diffraction measurements, this study identifies the characteristics of martensite which govern the extent of transformation induced deformation of ferrite grains. It was found that small austenite grains tend to transform into martensitic variants having a close-packed plane parallel relationship with adjacent ferrite grains, thus achieving relatively easy slip transmission and resulting in a long-range deformation of ferrite grains. Ferrite grains can also exhibit a short-range deformation limited to the vicinity of the ferrite/martensite interface, which is primarily governed by martensite carbon content.

SCRIPTA

Vol. 202, 1 Sep. 2021, 114031

8. The effects of interstitial hydrogen and carbon atoms and aging temperature on annihilation behavior of hydrogen-enhanced strain-induced vacancies in iron

间隙氢和碳原子以及时效温度对铁中氢增强应变诱导空位的湮没行为的影响

Yuri Sugiyama, Nami Kurihara, Yuya Matsumoto, Kenichi Takai✉

Kenichi Takai: takai-k@sophia.ac.jp

https://doi.org/10.1016/j.scriptamat.2021.114031

摘要

利用低温热脱附光谱(L-TDS)研究了间隙氢、碳原子和时效温度对铁中氢增强应变诱导空位(HESIVs)湮没行为的影响，其中L-TDS可以从-200°C开始升温。含HESIVs的样品在不同条件下进行时效，并充以示踪氢以检测晶格缺陷。随着时效时间的延长，在30°C的自然时效减少了热力学上不稳定的单个空位和双空位等小空位，但7天后仍存在聚集的空位。相比之下，在-196℃时效几乎不会引起任何空位扩散、聚集或湮灭。在30°C有氢和碳的条件下时效，降低了空位湮没率，并留下更多的空位。这些结果表明，铁中间隙碳和氢原子抑制了空位的扩散和湮灭，从而实现了空位的稳定。

向上滑动阅览英文摘要

The effects of interstitial hydrogen and carbon atoms and aging temperature on the annihilation behavior of hydrogen-enhanced strain-induced vacancies (HESIVs) in iron were examined using low-temperature thermal desorption spectroscopy (L-TDS) that can raise the temperature from -200 °C. Specimens containing HESIVs were aged under various conditions and charged with tracer hydrogen for detecting lattice defects. Atmospheric aging at 30 °C reduced small vacancies such as single vacancies and divacancies, which were thermally unstable, with increasing aging time, however, clustered vacancies remained after 7 days. In contrast, aging at -196 °C hardly caused any vacancy diffusion, aggregation, or annihilation. Aging in the presence of hydrogen and carbon at 30 °C reduced the rate of vacancy annihilation and left more vacancies, respectively. These findings indicate that interstitial hydrogen and carbon atoms in iron suppress the diffusion and annihilation of vacancies, resulting in vacancy stabilization.