首页|Tailoring microstructures and mechanical properties of Zr45Ti15Nb30Ta10 refractory complex concentrated alloy using warm-rolling

Tailoring microstructures and mechanical properties of Zr45Ti15Nb30Ta10 refractory complex concentrated alloy using warm-rolling

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Compared with cold rolling,warm rolling can significantly reduce or completely eliminate microstruc-ture damage to regulate the microstructure of the material,which is an effective method to improve the mechanical properties of the material.However,the effect of warm rolling on refractory complex concen-trated alloys(RCCAs)has rarely been reported.This research examines how warm rolling influences the microstructure,texture,and mechanical properties of the Zr45Ti15Nb30Ta10 RCCA.The RCCA was warm-rolled to a 75％reduction in thickness at 650 ℃(two-phase zone)and then annealed at 1000 ℃ for 1 h.To highlight the advantages of warm rolling,a comparison was conducted with similarly deformed and annealed cold-rolled RCCA.The warm-rolled RCCA exhibits a layered heterogeneous structure and induces the precipitation of the(Nb,Ta)-enriched bcc2 phase.The deformation texture of warm-rolled RCCA is weaker than that of cold-rolled RCCA,which is attributed to localized deformation inhomogene-ity.After annealing,warm rolling resulted in a remarkable increase in the yield strength of the RCCA,i.e.,from 861 MPa to 1071 MPa;meanwhile,moreover,the tensile plasticity was almost identical.Warm rolling leads to a change in plastic deformation of the RCCA from dislocation cross-slip to one dominated by the interaction of dislocations with subgrain boundaries as well as the bcc2 phase.The back tress gen-erated by the heterogeneous structure induced by warm rolling is also effective in increasing the yield strength of the RCCA.The remarkably layered heterogeneous structure,subgrain boundaries and textures result in warm-rolled RCCA with optimal strength-ductility combination.Our results provide an effective processing approach for tailoring the microstructure and mechanical properties of RCCAs.

Refractory complex concentrated alloyWarm rollingHeterogeneous structureMechanical properties

Yongkang Zhou、Shuai Zeng、Hongwei Zhang、Haifeng Zhang、Hongquan Gao、Hongwei Zhao、Zhengwang Zhu

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Shi-changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China

School of Materials Science and Engineering University of Science and Technology of China,Shenyang 110016,China

CAS Key Laboratory of Nuclear Materials and Safety Assessment,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China

School of Metallurgy,Northeastern University,Shenyang 110819,China

Unit 96901 PLA,Beijing 100094,China

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National Natural Science Foundation of ChinaChinese Academy of Sciences

52074257ZDBS-LY-JSC023

2024

10.1016/j.jmst.2023.11.057

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.187(20)
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