Understanding the Mechanism for the In-Plane Yielding Anisotropy of a Hot-Rolled Zirconium Plate  

作　　者：Guodong Song Conghui Zhang Yunchang Xin Nobuhiro Tsuji Xinde Huang Bo Guan Xiaomei He 

机构地区：[1]School of Metallurgical Engineering,Xi’an University of Architecture and Technology,Xi’an,710055,China [2]Key Laboratory for Light-Weight Materials,Nanjing Tech University,Nanjing,210009,China [3]Department of Materials Science and Engineering,Kyoto University,Yoshida-honmachi,Sakyo-ku,Kyoto,606-8501,Japan [4]Institute of Applied Physics,Jiangxi Academy of Science,Nanchang,330029,China

出　　处：《Acta Metallurgica Sinica(English Letters)》2024年第6期1066-1076,共11页金属学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.52275161);the Ministry of Science and Technology High-End Intelligence Plan Team Project(No.G2022040015L);the Shaanxi Science and Technology Innovation Team(No.2023-CX-TD-50);the Shaanxi Qin Chuangyuan scientists and engineers’team(No.2022KXJ-145);the International Joint Research Center for Value-added Metallurgy and Processing of Non-ferrous Metals(No.2019SD0010).

摘　　要：Previously,the in-plane mechanical anisotropy of Zr hot-rolled plates is ascribed mainly to the different activities of the deformation modes activated when loading along different directions.In this work,a quantitative study on the deformation behavior of a pure Zr hot-rolled plate under tension along the rolling direction(RD)and transverse direction(TD)reveals that both the activities of deformation modes and the anisotropy of grain boundary strengthening account for a tensile yield strength anisotropy along the TD and RD.Crystal plasticity simulations using viso-plastic self-consistent model show that prismatic slip is the predominant deformation mode for tension along the RD(RD-tension),while prismatic slip and basal slip are co-dominant deformation modes under tension along the TD(TD-tension).A low fraction of■under TD-tension,while hardly activated under RD-tension.The activation of basal slip with a much higher critical resolve shear stress under TD-tension contributes to a higher yield strength along the TD than along the RD.The grain boundary strengthening effect under tension along the TD and RD were compared by calculating the activation stress difference(△Stress)and the geometric compatibility factor(m′)between neighboring grains.The results indicate a higher grain boundary strengthening for TD-tension than that for RD-tension,which will lead to a higher yield strength along the TD.That is,the anisotropy of grain boundary strengthening between TD-tension and RD-tension also plays an important role in the in-plane anisotropy along the RD and TD.Afterward,the reasons for why there is a grain-boundary-strengthening anisotropy along the TD and RD were discussed.

关 键 词：ZIRCONIUM Strengthening Grain boundary Orientation 

分 类 号：TG453.9[金属学及工艺—焊接] TG146.414[一般工业技术—材料科学与工程]