Creep behavior and microstructural stability of Al-Cu-Mg-Ag and Al-Cu-Li-Mg-Ag alloys

被引：44

作者：

Kazanjian, SM ^{[1
]}

Wang, N ^{[1
]}

Starke, EA ^{[1
]}

机构：

[1] UNIV VIRGINIA,DEPT MAT SCI & ENGN,CHARLOTTESVILLE,VA 22903

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1997年 / 234卷

关键词：

aluminum alloys; creep; microstructural stability;

D O I：

10.1016/S0921-5093(97)00240-2

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 [材料科学与工程]; 080502 [材料学];

摘要：

To assist in the development of a high speed civil aircraft by NASA and airframe manufacturers, the University of Virginia (WA) has been examining the creep behavior of several candidate aluminum alloys. Under stresses and temperatures predicted to be experienced when cruising at Mach 2.0, measured creep strains of alloys C415, C416 and ML377 fall far below those of alloy 2618 (CM.001) which is currently in use on the supersonic Concorde. Microstructural evolution in the vicinity of the grain boundaries of these alloys has been examined directly in the transmission electron microscope and by fracturing crept specimens at cryogenic temperatures to expose grain facets. Variation in number density and size of grain boundary precipitates as the severity of creep conditions increases is related to creep behavior. (C) 1997 Elsevier Science S.A.

引用

页码：571 / 574

页数：4