Interaction effect between alpha and beta phases based on dynamic recrystallization of isothermally compressed Ti-5Al-2Sn-2Zr-4Mo-4Cr with basketweave microstructure

被引：36
作者：
Sun, J. Z. [1 ,2 ]
Li, M. Q. [1 ]
Li, H. [1 ,2 ]
机构：
[1] Northwestern Polytech Univ, Sch Mat Sci & Engn, Xian 710072, Peoples R China
[2] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 692卷
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Ti-5Al-2Sn-2Zr-4Mo-4Cr; Basketweave; Recrystallization; Macrozone; Hot deformation; IN-SITU OBSERVATION; 800; DEGREES-C; TITANIUM-ALLOY; TI-6AL-4V ALLOY; HOT-WORKING; TRANSFORMED MICROSTRUCTURE; LAMELLAR MICROSTRUCTURE; TEMPERATURE DEFORMATION; STATIC GLOBULARIZATION; TEXTURE EVOLUTION;
D O I：
10.1016/j.jallcom.2016.09.065
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The microstructure and texture evolution of isothermally compressed Ti-5Al-2Sn-2Zr-4Mo-4Cr with basketweave microstructure was examined via the high-resolution electron backscatter diffraction (EBSD) and transmission electron microscope (TEM). The rotational recrystallization (RRX) and the geometric dynamic recrystallization (GDRX) were the main recrystallization mechanisms of alpha phase. The typical continuous dynamic recrystallization (CDRX) was the main recrystallization mechanism of beta phase. Meanwhile, near the kinked shape alpha grains, the RRX of beta phase became an auxiliary mechanism to accommodate the high local stress. Besides, the dynamic recrystallization (DRX) in alpha phase played an important role in DRX of beta phase, which resulted in that the fragmental alpha grains were always accompanied with the DRX of beta phase in one macrozone. Moreover, with an intensive deformation, the "macrozone effect" played an important role in accommodating the whole arbitrary plastic strain. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：403 / 412
页数：10
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