Study on Microstructure,Texture and Mechanical Properties of Strip Casting Invar Alloy

被引：1
|
作者：
Song H.-Y. [1 ]
Liu H.-T. [1 ]
Wang G.-D. [1 ]
机构：
[1] State key Laboratory of Rolling and Automation, Northeastern University, Shenyang
来源：
Dongbei Daxue Xuebao/Journal of Northeastern University | 2020年 / 41卷 / 05期
关键词：
Cold rolling; Invar alloy; Mechanical properties; Microstructure; Strip casting; Texture;
D O I：
10.12068/j.issn.1005-3026.2020.05.019
中图分类号：
学科分类号：
摘要：
The twin-roll strip casting technology was introduced into the process of manufacturing invar alloy. Using optical microscope, XRD, EBSD, micro hardness(HV) and tensile testing instruments, the evolution of microstructure, texture and mechanical properties of the strip-casted invar alloy were investigated. The results show that the solidification microstructure of the strip-casted invar alloy is dominated by the coarse columnar grains of austenite and the associated texture is mainly the strong λ-fiber texture(<100>//ND). Thereafter, a large amount of deformation substructures are formed during a cold-rolling process, which increase the hardness(HV) from 165 to 230~240, and the cold-rolled texture is mainly composed by the typical copper texture ({112}<111>) and S texture ({123}<634>). A recrystallization microstructure containing numerous annealing twins together with a weak texture is observed in the 0.7mm-thick sheet after annealing at 700℃ for 10 min. The yielding strength, tensile strength and final elongation are 293 MPa, 433 MPa and 33.4%, respectively, which are similar to those of the 0.7mm-thick annealed sheet produced by the conventional process. © 2020, Editorial Department of Journal of Northeastern University. All right reserved.
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页码：723 / 728
页数：5
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