Defect tolerance of a gamma titanium aluminide alloy

被引：37

作者：

Filippini, M. ^{[1
]}

Beretta, S. ^{[1
]}

Patriarca, L. ^{[1
]}

Pasquero, G. ^{[2
]}

Sabbadini, S. ^{[2
]}

机构：

[1] Politecn Milan, Dipartimento Meccan, Via La Masa 1, I-20156 Milan, Italy

[2] Avio SpA, I-10040 Turin, Italy

来源：

11TH INTERNATIONAL CONFERENCE ON THE MECHANICAL BEHAVIOR OF MATERIALS (ICM11) | 2011年 / 10卷

关键词：

gamma titanium aluminides; high cycle fatigue; fatigue crack propagation; short crack behavior; FATIGUE; THRESHOLD; ENGINES;

D O I：

10.1016/j.proeng.2011.04.605

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The fatigue properties of a Ti-48Al-2Cr-2Nb alloy obtained by electron beam melting (EBM) with a patented process has been examined by conducting high cycle fatigue tests performed at different loading ratios at room temperature. Fatigue crack tests have been performed for the purpose of characterizing the fatigue crack growth rate and threshold of the material. In order to assess the sensitivity of the material to the presence of defects and to adopt suitable fatigue design criteria, fatigue tests with artificial defects have been also performed with different defect size and loading ratio. Fatigue tests have been interpreted by the adoption of a suitable model based on the small crack approach, highlighting individual fatigue characteristics of the studied TiAl alloy. (C) 2011 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of ICM11

引用

页码：3677 / 3682

页数：6

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