The out-of-phase thermomechanical fatigue behavior of Ultra SCS-6/Ti-24Al-17Nb-xMo (at.%) metal matrix composites

被引：7

作者：

Quast, J. P. ^{[1
]}

Boehlert, C. J. ^{[1
]}

机构：

[1] Michigan State Univ, Dept Chem Engn & Mat Sci, E Lansing, MI 48824 USA

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2010年 / 32卷 / 03期

关键词：

Thermomechanical fatigue; Intermetallics; Microstructures; Composites; Titanium alloys; CREEP-BEHAVIOR; MICROSTRUCTURE; ALLOYS; DAMAGE;

D O I：

10.1016/j.ijfatigue.2009.05.002

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The out-of-phase thermomechanical fatigue behavior of Ultra SCS-6/Ti-24Al-17Nb-2.3Mo (at.%), Ultra SCS-6/Ti-24Al-17Nb-1.1Mo (at.%), and Ultra SCS-6/Ti-24Al-17Nb-0.6Mo (at.%) continuously-reinforced metal matrix composites (MMCs) was investigated in order to understand the effect of Mo on the microstructure and fatigue behavior of titanium-alloy-matrix composites. From the recorded stress versus cycle behavior, two failure regimes were noted. For the highest stresses examined, fatigue-dominated failure occurred. For the lowest stresses examined, a creep-dominated failure occurred. The Ultra SCS6/Ti-24Al-17Nb-1.1Mo MMC exhibited the shortest fatigue lives for all the applied stress levels examined. The Ultra SCS-6/Ti-24Al-17Nb-2.3Mo MMC exhibited the longest fatigue lives for the lowest applied stress levels, and the Ultra SCS-6/Ti-24Al-17Nb-0.66Mo MMC exhibited the longest fatigue lives for most of the higher applied stress levels. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：610 / 620

页数：11

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