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Basal Stacking-Fault Induced Twin Boundary Gliding and Twin Growth in Ti from the First Principles 从第一性原理看基底叠合-断层诱导Ti中孪晶界滑动和孪晶界生长
EngRN: Metals & Alloys (Topic) Pub Date : 2020-01-27 DOI: 10.2139/ssrn.3522220
Qi Qian, Zhengqing Liu, Yong-zheng Jiang, Yiren Wang
{"title":"Basal Stacking-Fault Induced Twin Boundary Gliding and Twin Growth in Ti from the First Principles","authors":"Qi Qian, Zhengqing Liu, Yong-zheng Jiang, Yiren Wang","doi":"10.2139/ssrn.3522220","DOIUrl":"https://doi.org/10.2139/ssrn.3522220","url":null,"abstract":"First-principles calculations were performed to investigate the structures and energetics of {10-1n} coherent twin boundaries (CTBs) and glide twin boundaries (GTBs) in hexagonal close-packed Ti, to explore the formation mechanism of GTBs and its correlation with twin growth. Results suggested GTBs can form from the gliding of CTBs, induced by basal stacking fault. The gliding can eventually restore the CTB structures with newly formed pairs of single-layer twinning dislocations. Further movement of the twinning dislocations promotes twin growth. Possible effects of various alloying solutes on pinning twin boundaries were also evaluated, to guide the strengthening design of Ti alloys.","PeriodicalId":438337,"journal":{"name":"EngRN: Metals & Alloys (Topic)","volume":"1997 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123550980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of Different Welding Parameters on Weld Joint Penetration in TIG Welded Stainless Steel Plate 不同焊接参数对不锈钢TIG焊接接头熔深的影响
EngRN: Metals & Alloys (Topic) Pub Date : 2020-01-19 DOI: 10.2139/ssrn.3567245
Mayank Shrivastava, Rajeev Kumar
{"title":"Effects of Different Welding Parameters on Weld Joint Penetration in TIG Welded Stainless Steel Plate","authors":"Mayank Shrivastava, Rajeev Kumar","doi":"10.2139/ssrn.3567245","DOIUrl":"https://doi.org/10.2139/ssrn.3567245","url":null,"abstract":"The effects of process parameters of TIG welding on weld depth of penetration of welded joints of stainless steel plate of SS304 grade has been studied. The optimum combination of process parameters has been suggested to achieve maximum depth of penetration. Design of experiment (DOE) was used to plan and design the experiment to study the effects of parameter on these stresses. The input parameters considered in present investigation were welding current, gas flow rate, root face and welding speed. L9 Orthogonal Array (OA) technique was used to formulate the experimental layout. It was concluded that the maximum depth of penetration (DOP) was found at optimal setting of parameters of welding current (110 A), gas flow rate (10 LPM), root face (1.5 mm) and welding speed (31.578 mm/min.) and the optimum response value is 5.6961 mm.","PeriodicalId":438337,"journal":{"name":"EngRN: Metals & Alloys (Topic)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130410688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Optimization of GTA Welding Parameters for AISI 304 Stainless Steel using Taguchi Method 用田口法优化AISI 304不锈钢的GTA焊接参数
EngRN: Metals & Alloys (Topic) Pub Date : 2020-01-19 DOI: 10.2139/ssrn.3566687
Mayank Shrivastava, Rajeev Kumar
{"title":"Optimization of GTA Welding Parameters for AISI 304 Stainless Steel using Taguchi Method","authors":"Mayank Shrivastava, Rajeev Kumar","doi":"10.2139/ssrn.3566687","DOIUrl":"https://doi.org/10.2139/ssrn.3566687","url":null,"abstract":"This paper presents analyze the effects of process parameters on weld distortion and depth of weld penetration of GTA welded stainless steel plate of AISI 304 stainless steel Grade. The main aim of varying process parameter is to achieve minimum weld distortion and maximum weld bead penetration or depth of penetration. Design of experiment approach was used to plan and design the experiment to study the effect of welding process parameter on weld penetration of GTA welded stainless steel plate of AISI 304 stainless steel grade. Four input parameter- welding current, gas flow rate, root face and welding speed were selected to ascertain their effect on the distortion and depth of penetration. L9 Orthogonal Array technique is used to formulate the experiment layout. From the results obtained it is found that the Welding speed (WS) is the most significant parameter for distortion during gas tungsten arc welding. The recommended parametric combination for optimum distortion is welding current (90 A), gas flow rate (10 LPM), root face (1 mm) and welding speed (31.578 mm/min) and the optimum response value is 2.3996 mm. A confirmation experiment was also performed and verified for the effectiveness of the Taguchi method and the % error between predicted optimal and experimental values for selected response parameters were found well within the acceptable limit.","PeriodicalId":438337,"journal":{"name":"EngRN: Metals & Alloys (Topic)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114304609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On Spinodal-Like Phase Decomposition in U-50 Zr Alloy u - 50zr合金中spinodal样相分解的研究
EngRN: Metals & Alloys (Topic) Pub Date : 2020-01-03 DOI: 10.2139/ssrn.3507467
Tiankai Yao, A. Wagner, Xiang Liu, A. El-Azab, J. Harp, J. Gan, D. Hurley, M. Benson, Lingfeng He
{"title":"On Spinodal-Like Phase Decomposition in U-50 Zr Alloy","authors":"Tiankai Yao, A. Wagner, Xiang Liu, A. El-Azab, J. Harp, J. Gan, D. Hurley, M. Benson, Lingfeng He","doi":"10.2139/ssrn.3507467","DOIUrl":"https://doi.org/10.2139/ssrn.3507467","url":null,"abstract":"Finley dispersed two phase microstructures resulting from a spinodal decomposition are of interest as they are associated with enhanced mechanical properties and excessive interfaces to mitigate defect related behavior. This study reports a spinodal-like phase decomposition in a U-50Zr alloy by thermal annealing at 620°C and ion irradiation at 550°C, with the latter temperature too low to initiate phase transformation pure thermally. The results hold broad impact for U-Zr alloy systems and its application as advanced nuclear fuel.","PeriodicalId":438337,"journal":{"name":"EngRN: Metals & Alloys (Topic)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116861990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
A Large Barocaloric Effect Associated with Paramagnetic Martensitic Transformation in Co 50Fe 2.5V 31.5Ga 16 Quaternary Heusler Alloy co50fe 2.5V 31.5Ga 16四元Heusler合金中顺磁马氏体相变的大气压效应
EngRN: Metals & Alloys (Topic) Pub Date : 2019-07-08 DOI: 10.2139/ssrn.3416327
Hongwei Liu, Zhe Li, Yuanlei Zhang, Zhenting Ni, K. Xu, Yongsheng Liu
{"title":"A Large Barocaloric Effect Associated with Paramagnetic Martensitic Transformation in Co 50Fe 2.5V 31.5Ga 16 Quaternary Heusler Alloy","authors":"Hongwei Liu, Zhe Li, Yuanlei Zhang, Zhenting Ni, K. Xu, Yongsheng Liu","doi":"10.2139/ssrn.3416327","DOIUrl":"https://doi.org/10.2139/ssrn.3416327","url":null,"abstract":"This work reported a good two way shape memory effect associated with paramagnetic martensitic transformation (MT) in Co<sub>50</sub>Fe<sub>2.5</sub>V<sub>31.5</sub>Ga<sub>16</sub> quaternary Heusler alloy near room temperature.Associated with these unique behaviors, a large barocaloric effect (BCE) has been firstly realized in the studied alloy under a relatively low hydrostatic pressure. These interesting findings indicate that the Co-V-Ga system probably become a new promising candidate for application in solid-state refrigeration techniques based on BCE.","PeriodicalId":438337,"journal":{"name":"EngRN: Metals & Alloys (Topic)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123055093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Microstructural Characterization of Cold-Drawn Cu-Ni-Si Alloy Having High Strength and High Conductivity 高强度高导电性冷拔Cu-Ni-Si合金的显微组织表征
EngRN: Metals & Alloys (Topic) Pub Date : 2019-05-31 DOI: 10.1016/j.jallcom.2020.155059
H. Kim, J. Ahn, Seung-Zeon Han, J. Jo, H. Baik, H. Han, Miyoung Kim
{"title":"Microstructural Characterization of Cold-Drawn Cu-Ni-Si Alloy Having High Strength and High Conductivity","authors":"H. Kim, J. Ahn, Seung-Zeon Han, J. Jo, H. Baik, H. Han, Miyoung Kim","doi":"10.1016/j.jallcom.2020.155059","DOIUrl":"https://doi.org/10.1016/j.jallcom.2020.155059","url":null,"abstract":"","PeriodicalId":438337,"journal":{"name":"EngRN: Metals & Alloys (Topic)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114669251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 27
Deformation Coordination Mechanism of Dual-Phase Structure Steel Based on Martensite-Ferrite Under Medium-High Strain Rate 中高应变速率下马氏体-铁素体双相组织钢的变形协调机制
EngRN: Metals & Alloys (Topic) Pub Date : 2019-05-27 DOI: 10.2139/ssrn.3394586
Yi Li, R. Song, Erding Wen, Leifeng Zhang, Zhiyang Zhao, C. Cai, Yingchao Zhang, Chao Zhao, P. Yu, Shuyi Quan
{"title":"Deformation Coordination Mechanism of Dual-Phase Structure Steel Based on Martensite-Ferrite Under Medium-High Strain Rate","authors":"Yi Li, R. Song, Erding Wen, Leifeng Zhang, Zhiyang Zhao, C. Cai, Yingchao Zhang, Chao Zhao, P. Yu, Shuyi Quan","doi":"10.2139/ssrn.3394586","DOIUrl":"https://doi.org/10.2139/ssrn.3394586","url":null,"abstract":"Under medium (1 s-1, 10 s-1, 100 s-1) and high (500 s-1, 700 s-1, 800 s-1, 1000 s-1) strain rates, deformation coordination mechanism of 1200 MPa grade martensitic-ferrite dual-phase steel is completely opposite to that under quasi static or low strain rate (10-4-1 s-1). When the strain rate exceeds about 700 s-1, the harder phase (martensite) replaces the softer phase (ferrite) as prior deformation phase, and coordination effect of M/F (martensite/ferrite) interface is failed. As strain rate further increases, martensitic deformation amount increase dramatically. When martensitic deformation amount reaches saturation under about 1000 s-1, ferritic deformation amount restarts to increase.","PeriodicalId":438337,"journal":{"name":"EngRN: Metals & Alloys (Topic)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132395064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Long-Period Superlattices of γ' Phase in Ni-Based Superalloy ni基高温合金中γ′相的长周期超晶格
EngRN: Metals & Alloys (Topic) Pub Date : 2019-05-27 DOI: 10.2139/ssrn.3394585
Mai Yamashita, S. Ukai, S.M.S. Aghamiri, S. Hayashi, N. Oono, S. Miura, M. Mitsuhara
{"title":"Long-Period Superlattices of γ' Phase in Ni-Based Superalloy","authors":"Mai Yamashita, S. Ukai, S.M.S. Aghamiri, S. Hayashi, N. Oono, S. Miura, M. Mitsuhara","doi":"10.2139/ssrn.3394585","DOIUrl":"https://doi.org/10.2139/ssrn.3394585","url":null,"abstract":"Nanoscale lamellar structure was discovered in L1₂-type γ'-Ni₃(Al, Ta) precipitate. This structure was characterized by TEM phase contrast of antiphase boundary (APB) composed of aligned {110} planes. Lamellar spacing corresponds to APB period. The strictly periodical APB formation can be attributed to the formation of long-period superlattices (LPSs), and period of LPSs is ten times larger than that in conventional LPSs. The zigzag lamellar shape after tensile test suggested that the additional external force is required for deformation, and strength could be improved by LPSs structure in the γ' phase.","PeriodicalId":438337,"journal":{"name":"EngRN: Metals & Alloys (Topic)","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122682096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 Nickel Aluminide on the Bainite Transformation 镍铝化物对贝氏体相变的影响
EngRN: Metals & Alloys (Topic) Pub Date : 2019-03-23 DOI: 10.2139/ssrn.3359172
G. El-Fallah, S. Ooi, H. Bhadeshia
{"title":"Effect of Nickel Aluminide on the Bainite Transformation","authors":"G. El-Fallah, S. Ooi, H. Bhadeshia","doi":"10.2139/ssrn.3359172","DOIUrl":"https://doi.org/10.2139/ssrn.3359172","url":null,"abstract":"It is known that the presence of precipitates in the austenite can influence its subsequent transformation kinetics. This investigation deals specifically with the role of nickel aluminide precipitates on the rate of the bainite reaction, in recent alloys intended for applications at about 400°C. It is demonstrated that the aluminides lead to an increase in the nucleation kinetics of the bainite. Furthermore, their presence increases the total quantity of bainite that forms, thus helping to reduce the amount of blocky retained-austenite in the final microstructure.","PeriodicalId":438337,"journal":{"name":"EngRN: Metals & Alloys (Topic)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128537866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Local Lattice Distortion Mediated Formation of Stacking Faults in Mg Alloys 镁合金中局部晶格畸变介导的层错形成
EngRN: Metals & Alloys (Topic) Pub Date : 2019-03-23 DOI: 10.2139/ssrn.3358850
W. Wang, B. Tang, S. Shang, Jiangwei Wang, Shilei Li, Yi Wang, Jian Zhu, Siyuan Wei, Jun Wang, K. Darling, S. Mathaudhu, Yiguang Wang, Yang Ren, X. Hui, L. Kecskes, Jinshan Li, Zi-kui Liu
{"title":"Local Lattice Distortion Mediated Formation of Stacking Faults in Mg Alloys","authors":"W. Wang, B. Tang, S. Shang, Jiangwei Wang, Shilei Li, Yi Wang, Jian Zhu, Siyuan Wei, Jun Wang, K. Darling, S. Mathaudhu, Yiguang Wang, Yang Ren, X. Hui, L. Kecskes, Jinshan Li, Zi-kui Liu","doi":"10.2139/ssrn.3358850","DOIUrl":"https://doi.org/10.2139/ssrn.3358850","url":null,"abstract":"Abstract Long periodic stacking ordered phases (LPSOs), consisting of various configurations of stacking faults, play an important role in developing ultrastrong Mg alloys with moderate ductility. However, their formation mechanisms are far from clear as no apparent defects are introduced during their formation as it is commonly believed that stacking faults are induced by defects. Here, we present the atomic and electronic basis for lattice-distortion-mediated formation of stacking faults, i.e., localized face-centred-cubic (FCC) structures, within a Mg-Zn-Y alloy with a hexagonal close-packed (HCP) structure. The atomic motion trajectories from ab-initio molecular dynamic simulations show that the Mg atoms occupying the nearest neighbour positions of Zn and Y solute atoms undergo a local HCP-to-FCC transition. It is revealed that a local lattice distortion caused by the solute atoms enables the Mg atoms to move and rearrange into a local FCC configuration, which is validated by high resolution scanning transmission microscopy and in-situ synchrotron X-ray diffraction. Our simulations provide profound insight into the formation mechanism of stacking faults in HCP Mg and their physical nature of phase transformations. This is not only critically important because conventional defects, such as dislocations and vacancies, are important to deformation for Mg and its alloys, but also because they serve as a potential new approach to the design of advanced Mg alloys when defects could be used to facilitate.","PeriodicalId":438337,"journal":{"name":"EngRN: Metals & Alloys (Topic)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124839664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 36
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