THE INFLUENCE OF MATRIX MICROSTRUCTURE AND PARTICLE REINFORCEMENT ON THE CREEP-BEHAVIOR OF 2219 ALUMINUM

被引：79

作者：

KRAJEWSKI, PE ^{[1
]}

ALLISON, JE ^{[1
]}

JONES, JW ^{[1
]}

机构：

[1] FORD MOTOR CO,FORD RES LAB,DEARBORN,MI 48124

来源：

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1993年 / 24卷 / 12期

关键词：

D O I：

10.1007/BF02666278

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of matrix microstructure and reinforcement with 15 vol pct of TiC particles on the creep behavior of 2219 aluminum has been examined in the temperature range of 150-degrees-C to 250-degrees-C. At 150-degrees-C, reinforcement led to an improvement in creep resistance, while at 250-degrees-C, both materials exhibited essentially identical creep behavior. Precipitate spacing in the matrix exerted the predominant influence on minimum creep rate in both the unreinforced and the reinforced materials over the temperature range studied. This behavior and the high-stress dependence of minimum creep rate are explained using existing constant structure models where, in the present study, precipitate spacing is identified as the pertinent substructure dimension. A modest microstructure-independent strengthening from particle reinforcement was observed at 150-degrees-C and was accurately modeled by existing continuum mechanical models. The absence of reinforcement creep strengthening at 250-degrees-C can be attributed to diffusional relaxation processes at the higher temperature.

引用

页码：2731 / 2741

页数：11

共 31 条

[1] PARTICLE REINFORCEMENT OF DUCTILE MATRICES AGAINST PLASTIC-FLOW AND CREEP [J].