Strain-dependence of deformation microstructures in ultra-low-C IF steel deformed to high strains by torsion at elevated temperatures

作     者：Reza Gholizadeh Daisuke Terada Akinobu Shibata Nobuhiro Tsuji Reza Gholizadeh;Daisuke Terada;Akinobu Shibata;Nobuhiro Tsuji

作者机构：Department of Materials Science and EngineeringKyoto UniversityYoshida HonmachiSakyo-kuKyoto606-8501Japan ESISM(Elements Strategy Initiative for Structural Materials)Kyoto UniversityYoshida HonmachiSakyo-kuKyoto606-8501Japan Department of Advanced Materials Science and EngineeringChiba Institute of TechnologyTsudanumaNarashino275-0016Japan 

出 版 物：《Nano Materials Science》 (纳米材料科学（英文版）)

年 卷 期：2020年第2卷第1期

页      面：83-95页

核心收录：

学科分类：0821[工学-纺织科学与工程] 0817[工学-化学工程与技术] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：financially supported by the Grant-in-Aid for Scientific Research(S)(No.15H05767) the Grant-in-Aid for Scientific Research on Innovative Area,“Bulk Nanostructured Metals”(Area No.2201) the Elements Strategy Initiative for Structural Materials(ESISM,No.JPMXP0112101000) JST CREST(No.JPMJCR1994)all through the Ministry of Education,Culture,Sports,Science and Technology(MEXT),Japan 

主　　题：Severe plastic deformation Grain subdivision Ultrafine grains Zener-Hollomon parameter Boundary migration Electron backscattering diffraction(EBSD) 

摘      要：Single-phase bcc-ferrite in an interstitial free(IF)steel was deformed to different strains in a wide range from low to high strains(ε=1–7)by torsion under different Zener-Hollomon(Z)*** specimens were rapidly quenched after the torsion to preserve microstructures formed under different deformation *** results showed that during high-Z(low-temperature)deformation,grains were subdivided by geometrically necessary boundaries(GNBs)via the grain subdivision *** to high strains(ε5)led to the ultrafine lamellar structures(with grain sizes1μm)were realized with decreasing *** significance of the grain subdivision and the thermally activated phenomena on the formation of various microstructures under different deformation conditions is discussed.