The role of liquid phase in cavitation in a Si3N4p/Al-Mg-Si composite exhibiting high-strain-rate superplasticity

被引：48
|
作者：
Iwasaki, H
Mabuchi, M
Higashi, K
机构：
[1] NATL IND RES INST NAGOYA,KITA KU,NAGOYA,AICHI 462,JAPAN
[2] UNIV OSAKA PREFECTURE,COLL ENGN,DEPT MECH SYST ENGN,SAKAI,OSAKA 593,JAPAN
来源：
ACTA MATERIALIA | 1997年 / 45卷 / 07期
关键词：
D O I：
10.1016/S1359-6454(96)00404-1
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Cavitation was quantitatively investigated at 8 MPa and 833 K for a high-strain-rate superplastic Si3N4p/Al-Mg-Si composite, where the testing temperature of 833 K was slightly above the onset temperature for partial melting. Most of the cavities were very small (less than or equal to 1 mu m), and cavity development was not significant. Based on a theoretical analysis, when stress concentrations around reinforcements are relaxed by the presence of a liquid phase, excessive cavity development is suggested to be limited. This view is in agreement with the experimental results. (C) 1997 Acta Metallurgica Inc.
引用
收藏
页码：2759 / 2764
页数：6
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