Fatigue in laser shock peened open-hole thin aluminium specimens

被引：65

作者：

Ivetic, Goran ^{[1
]}

Meneghin, Ivan ^{[1
]}

Troiani, Enrico ^{[1
]}

Molinari, Gianluca ^{[1
]}

Ocana, Jose ^{[2
]}

Morales, Miguel ^{[2
]}

Porro, Juan ^{[2
]}

Lanciotti, Agostino ^{[3
]}

Ristori, Vjola ^{[3
]}

Polese, Claudia ^{[4
]}

Plaisier, Jasper ^{[5
]}

Lausi, Andrea ^{[5
]}

机构：

[1] Univ Bologna, Forli, Italy

[2] Univ Politecn Madrid, Madrid, Spain

[3] Univ Pisa, I-56100 Pisa, Italy

[4] Univ Witwatersrand, ZA-2050 Johannesburg, South Africa

[5] Elettra Synchrotron Light Lab, Trieste, Italy

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2012年 / 534卷

关键词：

Laser shock peening; Aluminium alloys; Synchrotron X-ray diffraction; Fatigue; Finite element method; CRACK GROWTH; BEHAVIOR; SURFACE; IMPROVE; STRESS;

D O I：

10.1016/j.msea.2011.12.010

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

An experimental study was performed in order to determine the influence of the sequence of operations on the effectiveness of Laser Shock Peening (LSP) treatment in increasing the fatigue performances of open-hole aluminium specimens. Residual stress measurements, fractographic analysis and FEM analysis were performed, indicating the presence of compressive residual stresses on the surface of the treated specimens and tensile residual stresses in the mid-section along the thickness of the specimens. Negative effects on fatigue lives were encountered on the specimens with the hole already present, while positive effect were observed in specimens in which the hole was drilled after LSP treatment. These results indicate that LSP can be a good solution for "in production" application, in which open holes are to be drilled after the LSP treatment. The application in which LSP is used "in service" on structures with pre-existing cut-outs, has proven to be impracticable in the investigated configuration. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：573 / 579

页数：7

共 25 条

[1] RESIDUAL-STRESSES INDUCED BY LASER-SHOCKS [J].