Residual stress relaxation in shot peened Timetal 21s

被引：61

作者：

Berger, MC ^{[1
]}

Gregory, JK ^{[1
]}

机构：

[1] Tech Univ Munich, Chair Mat Mech Engn, D-85747 Garching, Germany

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1999年 / 263卷 / 02期

关键词：

beta-titanium alloys; Timetal; 21s; microhardness; X-Ray;

D O I：

10.1016/S0921-5093(98)01165-4

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Selective surface aging treatments (mechanical surface treatment followed by aging) on beta-titanium alloys can result in higher endurance limits than conventional mechanical surface treatments. An explanation of fatigue behaviour of selectively surface aged parts should not only consider preferential precipitation strengthening but also take into account the remaining residual stresses. The beta-titanium alloy Timetal 21s with two oxygen contents (0.15 and 0.30 wt%), in two solution treated conditions (fully and partially recrystallized) was aged at temperatures between 350 and 500 degrees C after shot peening. Microhardness and X-Ray measurements allowed the determination of the degree of precipitation strengthening and relaxation of residual stresses, respectively, in the near surface regions during aging. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：200 / 204

页数：5

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