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金屬頂刊雙語導讀丨Scripta Mater. Vol.202, 1 Sep. 2021（下）

2021-08-08 來源：Goal Science

 

本期包含金屬材料領域論文8篇，涵蓋了高熵合金、不銹鋼、中熵合金等，國內科研單位包括四川大學等（通訊作者單位）。

 

Vol. 202 目錄

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

激光粉末床熔合法制備的304L奧氏體不銹鋼的斷裂韌性

 

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

通過大數據從頭計算分析揭示高熵合金形成的熱力學驅動力

 

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

15-5 PH不銹鋼時效過程中Cu析出介導的逆轉變奧氏體的形成

 

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

316L奧氏體不銹鋼的低溫氧氮化提高其在液態鉛鉍共晶中的耐蝕性

 

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

在室溫和液氮溫度下亞穩態非等原子FeNiCoMnTiSi鐵基中熵合金的變形誘導塑性和沉淀硬化的同步效應

 

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

調控中錳鋼力學性能的退火參數的新見解

 

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

理解雙相鋼中奧氏體向馬氏體轉變引起的鐵素體變形

 

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

間隙氫和碳原子以及時效溫度對鐵中氫增強應變誘導空位的湮沒行為的影響

 

 

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備的304L奧氏體不銹鋼的斷裂韌性

 

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)制備的304L奧氏體不銹鋼的單軸拉伸響應和J積分阻力行為。鋼在室溫下經歷相變誘導塑性(TRIP)，產生高的斷裂韌性(JQ)值以及高的強度(σY)和塑性。當溫度升高到75℃時，TRIP變得不活躍，變形機制以位錯滑移和孿晶為主。這導致了JQ的大幅降低和明顯的各向異性，而σY則保持不變。本文討論了這些結果在LPBF工藝制備的鋼的斷裂性能方面的意義。

向上滑動閱覽英文摘要

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 (JQ) values combined with high strength (σY) 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 JQ and marked anisotropy, while σY 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

通過大數據從頭計算分析揭示高熵合金形成的熱力學驅動力

 

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

目前對于高熵合金(HEAs)存在之外的基本熱力學驅動力仍然沒有充分的了解。本文利用熱力學模型結合從頭計算和正規溶液模型，建立了一個超過10萬、由27種常見元素形成的BCC和FCC等摩爾合金的數據庫。我們用統計的方法研究了隨機固溶體中焓和熵的貢獻隨著元素數目的變化是如何演變的。由于隨著元素數目的增加熵的重要性也在增加，普遍認為的HEAs穩定的合理化是有些矛盾的。熵和焓的貢獻有利于混合，但隨著合金中元素數目的增加，這兩種驅動力都減弱。通過將二元金屬間化合物添加到我們的分析中，可以得出結論，容易形成單相HEAs的特定化學成分需要在給定晶格上結合有利焓的元素混合，而不存在強競爭的金屬間化合物。

向上滑動閱覽英文摘要

 

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不銹鋼時效過程中Cu析出介導的逆轉變奧氏體的形成

 

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

通過原子探針斷層掃描、原位同步X射線衍射和計算熱力學和動力學，揭示了15-5 PH不銹鋼時效處理過程中Cu沉淀介導的奧氏體相變。奧氏體轉變是通過以下路徑發生的：Cu在馬氏體/殘余奧氏體界面或馬氏體板條界面析出→奧氏體穩定元素向Cu析出界面配分→逆轉變奧氏體形成。

向上滑動閱覽英文摘要

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奧氏體不銹鋼的低溫氧氮化提高其在液態鉛鉍共晶中的耐蝕性

 

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

Jun Wang: srwangjun@scu.edu.cn  四川大學

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

 

摘要

研究了316L ASS在823K真空滯留液鉛鉍共晶中低溫氧氮化(LTON)處理對LBE腐蝕行為的影響。結果表明，未處理樣品在液態LBE接觸下存在嚴重的選擇性浸出。LTON處理在試樣表面形成了一層Fe-Cr尖晶石多孔外膜和一層S相內膜，在LBE溶液腐蝕后形成了一層較厚的含有γlow-N的尖晶石膜和分布有CrN析出的區域。這主要是由于S相是亞穩態相，在高溫下比基體更容易被氧化，導致S相的氧化和分解以及間隙原子的向內擴散。這啟發我們，提高材料形成保護性氧化膜的能力可能是緩解液態LBE腐蝕的一個好方法。

向上滑動閱覽英文摘要

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 γlow-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

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

在室溫和液氮溫度下亞穩態非等原子FeNiCoMnTiSi鐵基中熵合金的變形誘導塑性和沉淀硬化的同步效應

 

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

本文研究了一種新型亞穩態65Fe-15Ni-8Co-8Mn-3Ti-Si (at%)鐵基中熵合金在298 K和77 K下的力學性能。采用短時間退火后的時效處理，獲得了由納米析出相裝飾的細晶粒和粗晶粒組成的非均質組織。時效處理后，合金的屈服強度從298K和77K時的0.9 GPa和1.3 GPa顯著提高到1.1 GPa和1.5 GPa，而總延伸率保持在20%以上。這種顯著的改善是由于時效合金在拉伸變形過程中異質變形誘導強化、力學納米孿晶、馬氏體相變以及均勻分布的納米級Fe2SiTi和Ni3Ti析出強化的協同效應。因此，相應的鐵基MEA可以被認為是在極端服役條件下超高強度部件的一種有前途的候選材料。

向上滑動閱覽英文摘要

 

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

調控中錳鋼力學性能的退火參數的新見解

 

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

Hua Ding: dingh@smm.neu.edu.cn  東北大學

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

 

摘要

中錳鋼的力學性能一般是通過調節臨界退火(IA)溫度和退火時間來實現的。然而，在本研究中，我們發現IA中的升溫過程對所研究中錳鋼的力學性能也有顯著的控制作用。不同溫度下，升溫周期越長，越有利于奧氏體晶粒的形成，從而使得在單個奧氏體晶粒內和不同奧氏體晶粒間的Mn元素分布更加不均勻。這種非均質組織導致了奧氏體板條之間屈服強度的差異和較慢的應變誘導馬氏體相變動力學。最終，在保持高的極限抗拉強度的同時，所研究的中錳鋼的屈服強度和總延伸率顯著提高。本研究為全面理解退火參數的影響提供了新的見解，以提高中錳鋼的力學性能。

向上滑動閱覽英文摘要

 

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

理解雙相鋼中奧氏體向馬氏體轉變引起的鐵素體變形

 

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鋼生產過程中，奧氏體向馬氏體轉變時伴隨的體積膨脹和形狀變化可以被周圍鐵素體晶粒的變形所適應。鐵素體晶粒的變形程度最終影響DP鋼的力學性能。利用電子背散射衍射，本研究確定了控制相變誘導鐵素體晶粒變形程度的馬氏體特征。研究發現，小奧氏體晶粒易于轉變為與相鄰鐵素體晶粒成密排平面平行關系的馬氏體變體，從而實現相對容易的滑移傳遞，導致鐵素體晶粒的長程變形。鐵素體晶粒也表現出限制于鐵素體/馬氏體界面附近的短程變形，這主要受馬氏體碳含量的影響。

向上滑動閱覽英文摘要

 

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.

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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

間隙氫和碳原子以及時效溫度對鐵中氫增強應變誘導空位的湮沒行為的影響

 

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

利用低溫熱脫附光譜(L-TDS)研究了間隙氫、碳原子和時效溫度對鐵中氫增強應變誘導空位(HESIVs)湮沒行為的影響，其中L-TDS可以從-200°C開始升溫。含HESIVs的樣品在不同條件下進行時效，并充以示蹤氫以檢測晶格缺陷。隨著時效時間的延長，在30°C的自然時效減少了熱力學上不穩定的單個空位和雙空位等小空位，但7天后仍存在聚集的空位。相比之下，在-196℃時效幾乎不會引起任何空位擴散、聚集或湮滅。在30°C有氫和碳的條件下時效，降低了空位湮沒率，并留下更多的空位。這些結果表明，鐵中間隙碳和氫原子抑制了空位的擴散和湮滅，從而實現了空位的穩定。

向上滑動閱覽英文摘要

 

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.

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