Retardation of fatigue crack growth in aircraft aluminium alloys via laser heating - Experimental proof of concept

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:546

Article

Schnubel, D.¹  Horstmann, M.¹  Ventzke, V.¹  Riekehr, S.¹  Staron, P.²  Fischer, T.²  Huber, N.¹ 

[1] Helmholtz Zentrum Geesthacht, Inst Mat Res Mat Mech, D-21502 Geesthacht, Germany

[2] Helmholtz Zentrum Geesthacht, Inst Mat Res Mat Phys, D-21502 Geesthacht, Germany

关键词: Laser heating;    Aluminium alloys;    Synchrotron X-ray diffraction;    Residual stresses;    Fatigue crack growth;   

DOI  :  10.1016/j.msea.2012.02.094

来源: Elsevier

【 摘 要 】

In this work, a defocused laser was used to modify the residual stress state in AA2198-T8 C(T)100 specimens with the goal of retarding fatigue crack growth. The manuscript provides a description of the process, the resulting changes of the material properties and the modified fatigue crack growth behaviour. The performed experiments, including thermocouple measurements, microscopical examinations, micro hardness measurements, residual stress measurements and fatigue crack growth measurements under constant amplitude loading show, that via laser heating a substantial retardation of fatigue crack growth can be achieved. (C) 2012 Elsevier B.V. All rights reserved.

【 授权许可】

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