Microstructure evolution during warm working of Ti-6Al-4V with a colony-α microstructure

被引：231
|
作者：
Mironov, S. [1 ]
Murzinova, M. [2 ]
Zherebtsov, S. [3 ]
Salishchev, G. A. [3 ]
Semiatin, S. L. [4 ]
机构：
[1] Tohoku Univ, Grad Sch Engn, Dept Mat Proc, Sendai, Miyagi 9808579, Japan
[2] Russian Acad Sci, Inst Met Superplast Problems, Ufa 450001, Russia
[3] Belgorod State Univ, Lab Bulk Nanostruct Mat, Belgorod 308015, Russia
[4] AFRL RXLM, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA
来源：
ACTA MATERIALIA | 2009年 / 57卷 / 08期
基金：
俄罗斯基础研究基金会;
关键词：
Titanium alloys; Warm working; Microstructure; Electron backscatter diffraction; HOT-WORKING; TRANSFORMED MICROSTRUCTURE; TITANIUM-ALLOY; DEFORMATION; PHASE; ALUMINUM; BEHAVIOR; FLOW;
D O I：
10.1016/j.actamat.2009.02.016
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A high-resolution electron backscatter diffraction technique was employed to investigate microstructure evolution during warm working of Ti-6Al-4V with a colony-alpha. microstructure. Particular emphasis was paid to the specific mechanisms governing this process. Microstructure development was found to be driven mainly by the geometrical requirements of the imposed strain and by the kinking of alpha lamellae. For the most part, the lamellar microstructure was surprisingly stable during straining, with limited globularization observed only in kinked alpha colonies. The kinking process was shown to be closely linked with the development of shear bands within the colonies. These observations Suggest that changes in strain path may be beneficial in promoting globularization during warm working. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：2470 / 2481
页数：12
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