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Rhenium alloying strengthens a ductile refractory high entropy alloy 铼合金强化韧性耐火高熵合金
IF 5.3 2区 材料科学
Scripta Materialia Pub Date : 2024-11-18 DOI: 10.1016/j.scriptamat.2024.116464
Xichen Zhou , Qianyong Zhu , Xiao Liang , Qihan Jia , Cheng Zhang , Shiteng Zhao , Hongbo Guo
{"title":"Rhenium alloying strengthens a ductile refractory high entropy alloy","authors":"Xichen Zhou ,&nbsp;Qianyong Zhu ,&nbsp;Xiao Liang ,&nbsp;Qihan Jia ,&nbsp;Cheng Zhang ,&nbsp;Shiteng Zhao ,&nbsp;Hongbo Guo","doi":"10.1016/j.scriptamat.2024.116464","DOIUrl":"10.1016/j.scriptamat.2024.116464","url":null,"abstract":"<div><div>Strengthening alloys at both ambient and elevated temperatures without compromising room temperature ductility remains a significant challenge in the structural materials field. Recently, we reported a ductile NbTaTi-based refractory high-entropy alloy (RHEA) capable of maintaining high strength up to 1200°C. In this study, we demonstrate that adding 1 at. % Re to this alloy provides further strengthening while preserving excellent cold machinability. Additionally, microstructure optimization was achieved through partial recrystallization, resulting in a heterogeneous lamella structure with alternating coarse and fine grain layers. This optimized structure further enhances the alloy's room temperature tensile strength, exceeding 1 GPa with uniform elongation above 10%. The designed alloy also retains a high strength of nearly 150 MPa at 1300°C. Our findings demonstrate that Re alloying is an effective strategy for improving the mechanical properties of NbTaTi-based RHEAs.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"257 ","pages":"Article 116464"},"PeriodicalIF":5.3,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of B4C addition on the microstructure and mechanical properties of 304L austenitic stainless steel fabricated using laser powder bed fusion 添加 B4C 对使用激光粉末床熔融技术制造的 304L 奥氏体不锈钢微观结构和机械性能的影响
IF 5.3 2区 材料科学
Scripta Materialia Pub Date : 2024-11-15 DOI: 10.1016/j.scriptamat.2024.116458
Xiaoyu Sun , Hang Sun , Zhiguang Zhu , Upadrasta Ramamurty
{"title":"Effect of B4C addition on the microstructure and mechanical properties of 304L austenitic stainless steel fabricated using laser powder bed fusion","authors":"Xiaoyu Sun ,&nbsp;Hang Sun ,&nbsp;Zhiguang Zhu ,&nbsp;Upadrasta Ramamurty","doi":"10.1016/j.scriptamat.2024.116458","DOIUrl":"10.1016/j.scriptamat.2024.116458","url":null,"abstract":"<div><div>The microstructure and mechanical properties of 304L austenitic stainless steel fabricated using laser powder bed fusion (L-PBF) upon the addition of B<sub>4</sub>C are examined. The addition of B<sub>4</sub>C induces the formation of Cr<sub>2</sub>B at the cell boundaries and a multi-scale microstructural evolution that includes changes in the ferrite content, grain morphology, and crack formation, all of which significantly enhanced the yield strength of 304L at room temperature, due to the formation of Cr<sub>2</sub>B and C in solid solution. However, the C in solution, combined with the formation of Cr<sub>2</sub>B that consumes Cr from the alloy, increases the stacking fault energy (SFE) and, in turn, inhibits the stress-induced martensitic transformation. The primary deformation mechanism in the <span>L</span>-PBF 304L added with 1 wt.% B<sub>4</sub>C transitions from twinning at room temperature to stress-induced martensitic transformation, due to the reduced SFE, at 77 K.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"257 ","pages":"Article 116458"},"PeriodicalIF":5.3,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modelling the evolution of microstructural bands in a martensite/austenite Q&P-processed stainless steel 马氏体/奥氏体 Q&P 加工不锈钢微观结构带演变建模
IF 5.3 2区 材料科学
Scripta Materialia Pub Date : 2024-11-14 DOI: 10.1016/j.scriptamat.2024.116457
Gaojie Li , Konstantina Traka , Kees Kwarkernaak, Yaiza Gonzalez-Garcia, Maria J. Santofimia
{"title":"Modelling the evolution of microstructural bands in a martensite/austenite Q&P-processed stainless steel","authors":"Gaojie Li ,&nbsp;Konstantina Traka ,&nbsp;Kees Kwarkernaak,&nbsp;Yaiza Gonzalez-Garcia,&nbsp;Maria J. Santofimia","doi":"10.1016/j.scriptamat.2024.116457","DOIUrl":"10.1016/j.scriptamat.2024.116457","url":null,"abstract":"<div><div>This work discusses the microstructure evolution observed in a quenching and partitioning (Q&amp;P)-processed martensite/austenite stainless steel during the partitioning step at 400 °C for 300 s, where distinct microstructural bands rich in austenite due to elemental segregation, evolve into a uniform distribution of austenite grains. This phenomenon is characterised and investigated using a model for the carbon partitioning from martensite to austenite coupled with the movement of the martensite-austenite interface. The observed elimination of microstructural bands is found to be related to the topological distribution of austenite grains and the heterogeneity of the thermodynamic equilibrium regime at the various interfaces governing the partitioning process. Furthermore, the concurrence of banding elimination (local equilibrium) and phase growth towards the global equilibrium phase fractions is investigated in the simulations in terms of the role of Mn. It is found that the local equilibrium-negligible partitioning (LENP) conditions lead to the most realistic outcome.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"257 ","pages":"Article 116457"},"PeriodicalIF":5.3,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Strain glass state in Ni50.3Ti29.7Hf20 high-temperature shape memory alloy Ni50.3Ti29.7Hf20 高温形状记忆合金中的应变玻璃态
IF 5.3 2区 材料科学
Scripta Materialia Pub Date : 2024-11-13 DOI: 10.1016/j.scriptamat.2024.116449
Longjia Li , Zhongsheng Yang , Kengfeng Xu , Dingcong Cui , Lei Wang , Zhijun Wang , Junjie Li , Jincheng Wang , Feng He
{"title":"Strain glass state in Ni50.3Ti29.7Hf20 high-temperature shape memory alloy","authors":"Longjia Li ,&nbsp;Zhongsheng Yang ,&nbsp;Kengfeng Xu ,&nbsp;Dingcong Cui ,&nbsp;Lei Wang ,&nbsp;Zhijun Wang ,&nbsp;Junjie Li ,&nbsp;Jincheng Wang ,&nbsp;Feng He","doi":"10.1016/j.scriptamat.2024.116449","DOIUrl":"10.1016/j.scriptamat.2024.116449","url":null,"abstract":"<div><div>NiTiHf alloy is one of the most promising candidates for high-temperature shape-memory actuators. Although the phase transition behavior of NiTiHf is well understood, there are still new revelations. Here, we for the first time report the strain glass state in a NiTiHf alloy. Our results demonstrate that the H-phase precursor generated during rapid cooling suppresses the normal martensitic phase transition of NiTiHf, leading to the strain glass state. Moreover, we successfully controlled the strain glass transition via changing the cooling rate. These new findings make the NiTiHf system promising for high-temperature superelastic materials.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"257 ","pages":"Article 116449"},"PeriodicalIF":5.3,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Alternating ductile and brittle cracking mode in medium manganese steel sheets 中锰钢板的韧性和脆性交替开裂模式
IF 5.3 2区 材料科学
Scripta Materialia Pub Date : 2024-11-11 DOI: 10.1016/j.scriptamat.2024.116450
Thibaut Heremans , Astrid Perlade , Pascal J. Jacques , Thomas Pardoen
{"title":"Alternating ductile and brittle cracking mode in medium manganese steel sheets","authors":"Thibaut Heremans ,&nbsp;Astrid Perlade ,&nbsp;Pascal J. Jacques ,&nbsp;Thomas Pardoen","doi":"10.1016/j.scriptamat.2024.116450","DOIUrl":"10.1016/j.scriptamat.2024.116450","url":null,"abstract":"<div><div>Medium manganese steel sheets exhibit an unusual alternating failure mode transition involving an arrowhead fracture pattern under various loading conditions. Tests were performed using an Arcan setup with different shear-to-tension ratios and specimen orientations to explore the failure mechanisms and unravel the root causes of the transition. The fracture surfaces, characterized by optical and electron microscopy, show a periodic switchover from ductile damage to quasi-cleavage, organized into repeating arrowhead zones pointing towards the crack propagation direction. The step-by-step crack propagation leaves a signature on the load-displacement curve matching the discontinuous cracking events found on the fracture surfaces. A reduction of the stress-intensity factor due to sudden crack advance and associated load drop causes the brittle crack to arrest. Periodic porosity clusters under the fracture surface indicate re-blunting after each cycle of stable/unstable fracture.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"257 ","pages":"Article 116450"},"PeriodicalIF":5.3,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An in-situ Raman spectroscopy investigation of the oxidation of proton irradiated and cold-worked 304L stainless steel in oxygenated water at 300°C 质子辐照和冷加工的 304L 不锈钢在 300°C 含氧水中氧化的原位拉曼光谱研究
IF 5.3 2区 材料科学
Scripta Materialia Pub Date : 2024-11-11 DOI: 10.1016/j.scriptamat.2024.116447
V.S. Ramsundar, A. Shaik, K. Daub, M.R. Daymond, S.Y. Persaud
{"title":"An in-situ Raman spectroscopy investigation of the oxidation of proton irradiated and cold-worked 304L stainless steel in oxygenated water at 300°C","authors":"V.S. Ramsundar,&nbsp;A. Shaik,&nbsp;K. Daub,&nbsp;M.R. Daymond,&nbsp;S.Y. Persaud","doi":"10.1016/j.scriptamat.2024.116447","DOIUrl":"10.1016/j.scriptamat.2024.116447","url":null,"abstract":"<div><div>A facility consisting of a high temperature and pressure corrosion loop coupled with in-situ Raman spectroscopy and proton irradiation has been used to investigate the oxide development on as-received, cold-worked and proton-irradiated 304 L stainless steel (SS) in water at 300 °C over a 48-hour period. Chemical and semi-quantitative kinetic information were obtained. The as-received and 0.1 dpa SS displayed similar oxidation kinetics and chemistry across all timespans, indicating that the damage imparted by protons was not sufficient in this case to manifest a detectable change in the oxide. However, modifications in the spinel oxide chemistry and increased oxidation kinetics with time were observed for the 3.0 dpa and cold-worked SS.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"257 ","pages":"Article 116447"},"PeriodicalIF":5.3,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Measuring the strength of ductile microparticles at extreme strain rates 在极端应变速率下测量韧性微粒的强度
IF 5.3 2区 材料科学
Scripta Materialia Pub Date : 2024-11-10 DOI: 10.1016/j.scriptamat.2024.116446
Tyler J. Lucas , Chrisopher A. Schuh
{"title":"Measuring the strength of ductile microparticles at extreme strain rates","authors":"Tyler J. Lucas ,&nbsp;Chrisopher A. Schuh","doi":"10.1016/j.scriptamat.2024.116446","DOIUrl":"10.1016/j.scriptamat.2024.116446","url":null,"abstract":"<div><div>We propose a method using high-velocity ballistic impacts of deformable microparticles on a rigid target to assess particle strength at strain rates exceeding 10<sup>6</sup>/s. High-speed imaging allows us to view particle behavior in-situ, which is then compared to models to elicit insight into plasticity. Over a range of velocities, the power-law decline of the rebound velocity permits fitting with a single dynamic yield strength, which finite element analysis shows matches well with the average strength of the particle over the duration of the impact, even as it experiences large strain and strain-rate hardening.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"257 ","pages":"Article 116446"},"PeriodicalIF":5.3,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Thermo-kinetic origin for strength-ductility trade-off phenomena 强度-电导率折衷现象的热动力学起源
IF 5.3 2区 材料科学
Scripta Materialia Pub Date : 2024-11-09 DOI: 10.1016/j.scriptamat.2024.116448
Zhigang Ding , Jincheng Kan , Haoran Peng , Linke Huang , Huaiyu Hou , Feng Liu
{"title":"Thermo-kinetic origin for strength-ductility trade-off phenomena","authors":"Zhigang Ding ,&nbsp;Jincheng Kan ,&nbsp;Haoran Peng ,&nbsp;Linke Huang ,&nbsp;Huaiyu Hou ,&nbsp;Feng Liu","doi":"10.1016/j.scriptamat.2024.116448","DOIUrl":"10.1016/j.scriptamat.2024.116448","url":null,"abstract":"<div><div>Strength-ductility trade-off has been a long-standing dilemma in materials science, greatly limit the potential applications of various structural materials. Here, we explore the underlying physics of such paradox based on recently proposed generalized stability (GS) criterion. We propose that the strength-ductility trade-off relationship physically dominated by the correlation between thermodynamics driving force (Δ<em>G</em>) and the kinetic energy barrier (<em>Q</em>). Thus, we establish an intrinsic connection between GS criterion and mechanical properties, that high Δ<em>G</em> correspond to high strength, while small GS values associate with high plasticity. Additionally, we find that a new thermo-kinetic correlation ensuring sufficiently slow and steady dislocation slip in nano-twinned crystalline and gradient nanocrystalline, which break the original thermo-kinetic correlation for dislocation slip in nanocrystalline and achieve an excellent strength-ductility balance. This offers a quantitative method to optimize the strength and ductility of metal materials by thermo-kinetic properties.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"257 ","pages":"Article 116448"},"PeriodicalIF":5.3,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cooperative game during phase transformations in complex alloy systems 复杂合金体系相变过程中的合作博弈
IF 5.3 2区 材料科学
Scripta Materialia Pub Date : 2024-11-07 DOI: 10.1016/j.scriptamat.2024.116440
Dingqi Zhao , Junwei Qiao , Yong Zhang , Peter K. Liaw
{"title":"Cooperative game during phase transformations in complex alloy systems","authors":"Dingqi Zhao ,&nbsp;Junwei Qiao ,&nbsp;Yong Zhang ,&nbsp;Peter K. Liaw","doi":"10.1016/j.scriptamat.2024.116440","DOIUrl":"10.1016/j.scriptamat.2024.116440","url":null,"abstract":"<div><div>Phase-transformation models in high-entropy alloys face a dual challenge of scale and complexity because of their characteristics of complex systems. The phase-transformation theory in simple alloys is based on reductionism, which has limitations when used for complex systems. Under the framework of the renormalization group procedure, a machine-learning method was employed that can describe phase-transformations in alloy systems in a manner that differs from traditional data-driven machine learning. We have constructed a comprehensive alloy dataset, grounded in real experimental data, to validate our models. A 98 % accuracy rate has been achieved by the algorithm in the test set. Using the cooperative game theory to further explain the mathematical model established by machine learning, it is found that the established model can include some phase-transformation criteria found by previous researchers. The findings of this study provide insights into the order-disorder phase transformation in alloys from a new perspective, as well as some specific conclusions that are applicable to the design of complex alloys.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"257 ","pages":"Article 116440"},"PeriodicalIF":5.3,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of hydrogen on the basal dissociation of 〈a〉-type screw dislocation core in titanium 氢对钛中〈a〉型螺旋位错核心基底解离的影响
IF 5.3 2区 材料科学
Scripta Materialia Pub Date : 2024-11-07 DOI: 10.1016/j.scriptamat.2024.116444
Yunping Jia , Yijie Chen , Shuanglin Hu , Xiaosong Zhou
{"title":"Effect of hydrogen on the basal dissociation of 〈a〉-type screw dislocation core in titanium","authors":"Yunping Jia ,&nbsp;Yijie Chen ,&nbsp;Shuanglin Hu ,&nbsp;Xiaosong Zhou","doi":"10.1016/j.scriptamat.2024.116444","DOIUrl":"10.1016/j.scriptamat.2024.116444","url":null,"abstract":"<div><div>The existence of basal dissociated screw dislocation core structure of titanium with different H concentrations is investigated by first-principles calculation. The calculation of stacking fault energy of the basal plane with H in different layers suggests that a high H concentration would be beneficial for basal dissociation. The direct calculation based on the dislocation core instead proved that a small amount of H cannot stabilize the basal dissociated core structure. When H concentration increases, the basal dissociated core configuration and some mixed cores with basal faults could be more stable than the pyramidal dissociated structure.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"257 ","pages":"Article 116444"},"PeriodicalIF":5.3,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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