Effect of shot peening on fatigue performance of a lamellar titanium aluminide alloy

被引：117
作者：
Lindemann, J
Buque, C
Appel, F
机构：
[1] GKSS Forschungszentrum Geesthacht GmbH, Mat Res Inst, D-21502 Geesthacht, Germany
[2] Tech Univ Braunschweig, Chair Phys Met & Mat Technol, D-03013 Cottbus, Germany
来源：
ACTA MATERIALIA | 2006年 / 54卷 / 04期
关键词：
shot peening; high cycle fatigue; gamma titanium aluminides;
D O I：
10.1016/j.actamat.2005.10.043
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Shot peening is assessed as a potential method for improving the fatigue strength of titanium aluminide alloys based on gamma(TiAl). Metallo-graphic characterization was performed with regard to surface roughness, microhardness, residual stress profiles, and structural changes occurring in the subsurface region. The fatigue performance that can be achieved by shot peening mainly depends on the compressive stresses left in the surface region, but is also governed by the fine details of the microstructure. In view of the anticipated high-temperature application of TiAl alloys, particular emphasis is placed on the thermal stability of the surface hardening developed by shot peening. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：1155 / 1164
页数：10
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