Influence of thermomechanical processing on microstructural evolution in near-α alloy IMI834

被引：111
作者：
Wanjara, P
Jahazi, M
Monajati, H
Yue, S
机构：
[1] Natl Res Council Canada, Inst Aerosp Res, Aerosp Mfg Technol Ctr, Montreal, PQ H3S 2S4, Canada
[2] McGill Univ, Montreal, PQ H3A 2B2, Canada
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2006年 / 416卷 / 1-2期
关键词：
titanium alloys; dynamic recrystallization; isothermal deformation; shear banding; flow softening;
D O I：
10.1016/j.msea.2005.10.042
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effect of processing parameters on the evolution of the microstructural characteristics of IMI834 were examined over the temperature range 950-1125 degrees C at constant strain rates of 0.001-1 s(-1) and true strains up to 1.2. During isothermal deformation, differences in the flow softening behavior were observed for processing in the single-phase beta region, as compared to the two-phase alpha-beta region, which has been related to differences in the structural changes occurring in IMI834. In particular, deformation processing of the alpha-beta structure was observed to work the lamellar alpha structure of the transformed beta grains without recrystallization of either phase, whilst microstructural development in a predominately beta structure resulted in the formation of dynamically recrystallized grains that were necklaced around the deformed and elongated beta phase. For the later case, the variation in the dynamically recrystallized grain size was determined to follow a Zener-Hollomon relationship between a strain rate range 0.001 and 1 s(-1). (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：300 / 311
页数：12
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