Deformation localization and recrystallization in TC4 alloy under impact condition

被引：65
作者：
Li, GA [1 ]
Zhen, L [1 ]
Lin, C [1 ]
Gao, RS [1 ]
Tan, X [1 ]
Xu, CY [1 ]
机构：
[1] Harbin Inst Technol, Dept Mat Sci, Harbin 150001, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2005年 / 395卷 / 1-2期
关键词：
high velocity impact; deform localization; recrystallization; micro-voids;
D O I：
10.1016/j.msea.2004.12.020
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
GCr15 steel balls 4 mm in diameter were used as projectiles to impact different thickness Ti-6Al-4V targets at a speed of 1.5 km/s. Two types of adiabatic shear bands (ASBs) near the craters were distinguished by optical microscopy deformed shear bands; white-etching shear bands. The white-etching bands and deformed bands coexist in thin targets. In two other types of targets, only the white-etching bands were observed. The boundary between the white-etching bands and matrix is very clear. Micro-voids and cracks are observed in white-etching bands. Observation by transmission electron microscope (TEM) reveals that the white-etching bands contain nano-size equiaxed grains, which confirm that recrystallization occurs during white-etching bands formation. (c) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：98 / 101
页数：4
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