ChemRN: Metals & Alloys (Topic)最新文献

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The Mechanism of Internal Fatigue-Crack Initiation in a Titanium Alloy with Lamellar and Equiaxed Microstructure 层状等轴组织钛合金内部疲劳裂纹萌生机制研究

ChemRN: Metals & Alloys (Topic) Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3491826

Xiangnan Pan, Shouwen Xu, G. Qian, A. Nikitin, A. Shanyavskiy, T. Palin-Luc, Youshi Hong

引用次数: 1

Micro-Crystallographic Analysis of Shear Band Formation Mechanism in Cold Rolled Al-Sc Alloys at Different Precipitation States 不同析出状态下冷轧Al-Sc合金剪切带形成机制的微晶学分析

ChemRN: Metals & Alloys (Topic) Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3708668

C. Dan, Zhe Chen, Q. Shi, V. Ji, S. Zhong, Z. Moumni, Hao Wei Wang

{"title":"Micro-Crystallographic Analysis of Shear Band Formation Mechanism in Cold Rolled Al-Sc Alloys at Different Precipitation States","authors":"C. Dan, Zhe Chen, Q. Shi, V. Ji, S. Zhong, Z. Moumni, Hao Wei Wang","doi":"10.2139/ssrn.3708668","DOIUrl":"https://doi.org/10.2139/ssrn.3708668","url":null,"abstract":"The debate on whether the slip in Shear Bands (SBs) is crystallographic or non-crystallographic has continued for decades. In the present study, shear banding in cold-rolled Al-0.2 wt.% Sc alloys with different precipitation states were characterized to elucidate the mechanism of SBs formation and propagation across grain boundaries. The generated SBs are observed only in grains of S {123} and Copper {112} orientation. The orientation of SBs in the S orientation grains is close to R {142} , while the SBs in Copper orientation grains possess an orientation close to D {11 4 4} . This orientation dependency is proven to in tight association with asymmetric slips and local lattice reorientation. A periodic change in the slip systems is accompanied by a periodic change in the lattice orientation between parallel SBs. Through conducting the focussed ion beam (FIB) lift-out method and TEM analysis, the dislocations and slip activation in/around SBs are revealed. The results indicate that a sudden change in the slip path during deformation leads to flow localization, contributing to the formation of SBs. In this process, fine Al3Sc precipitates are characterized to promote the formation of SBs through inhibiting the dynamic recovery. The mechanism of SBs formation is crystallographic as the slip in SBs occurs on {111} planes with local lattice reorientation and the SBs propagation across grain boundaries is also driven by the slip on {111} planes. Furthermore, the effects of SBs on texture evolution are discussed as well.","PeriodicalId":159806,"journal":{"name":"ChemRN: Metals & Alloys (Topic)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129045894","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

Magnetic Domain Structure Across the Austenite-Martensite Interface in Ni50Mn25Ga20Fe5 Single Crystalline Thin Foil by Lorentz Microscopy 用洛伦兹显微镜观察Ni50Mn25Ga20Fe5单晶薄片奥氏体-马氏体界面的磁畴结构

ChemRN: Metals & Alloys (Topic) Pub Date : 1900-01-01 DOI: 10.2139/ssrn.3855722

M. Vronka, L. Straka, M. Klementová, O. Heczko

引用次数: 0

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