MICROSTRUCTURAL EVOLUTION AND THERMAL-STABILITY OF PRECIPITATION-STRENGTHENED CU-8CR-4NB ALLOY

被引：42

作者：

ANDERSON, KR ^{[1
]}

GROZA, JR ^{[1
]}

DRESHFIELD, RL ^{[1
]}

ELLIS, D ^{[1
]}

机构：

[1] NASA,LEWIS RES CTR,CLEVELAND,OH 44135

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1993年 / 169卷 / 1-2期

基金：

美国国家航空航天局;

关键词：

D O I：

10.1016/0921-5093(93)90611-H

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The microstructural changes that occur during age hardening of a precipitation-strengthened copper alloy with 8 at.% Cr and 4 at.% Nb (Cu-8Cr-4Nb) alloy were studied by TEM technique and correlated to the corresponding mechanical properties at room and elevated temperatures. The thermal stability of Cu-8Cr-4Nb alloy was attributed to the fine distribution of secondary precipitates and their slow-coarsening rate upon aging. These secondary precipitates provide strengthening by the Orowan mechanism and restrict grain growth upon aging. The experimental values of mechanical properties are compared to the results anticipated from Orowan and Hall-Petch strengthening models to account for the main strengthening mechanisms of the present alloy.

引用

页码：167 / 175

页数：9

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