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Proceedings of ABM Annual Congress

ISSN 2594-5327

65º Congresso ABM — vol. 65, num.65 (2010)

Title

INFLUENCE OF SHOT PEENED ALUMINIUM ALLOY 7075- T651 ON FATIGUE AND CORROSION RESISTANCE

INFLUENCE OF SHOT PEENED ALUMINIUM ALLOY 7075- T651 ON FATIGUE AND CORROSION RESISTANCE

Authorship

Zupanc, U.; Grum, J.

Zupanc, U.
Zupanc, U.

I am this author

Grum, J.
Grum, J.

I am this author

DOI

10.5151/2594-5327-17034

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Abstract

Shot peening (SP) is an important and well-known cold working process having been used in industrial applications for a long time. Shot peening as intense plastic deformation in the thin surface layer affects cold surface hardening by primary inducing favourable residual compressive stresses. It is used in order to increase fatigue strength in operation and to improve corrosion resistance of treated material. Pitting corrosion has a major influence on aging of structural elements made of high- strength aluminium alloys as corrosion pits lead to much earlier fatigue crack initiation under tensile dynamic loading. The paper deals with surface integrity of shot peened high-strength 7075-T651 aluminium alloy. The paper describes effects of SP treatment by presenting analyses of surface roughness measurement, residual stresses, material bending fatigue resistance, fractographic analysis of fatigued samples and electrochemical potentiodynimic testing.

 

Shot peening (SP) is an important and well-known cold working process having been used in industrial applications for a long time. Shot peening as intense plastic deformation in the thin surface layer affects cold surface hardening by primary inducing favourable residual compressive stresses. It is used in order to increase fatigue strength in operation and to improve corrosion resistance of treated material. Pitting corrosion has a major influence on aging of structural elements made of high- strength aluminium alloys as corrosion pits lead to much earlier fatigue crack initiation under tensile dynamic loading. The paper deals with surface integrity of shot peened high-strength 7075-T651 aluminium alloy. The paper describes effects of SP treatment by presenting analyses of surface roughness measurement, residual stresses, material bending fatigue resistance, fractographic analysis of fatigued samples and electrochemical potentiodynimic testing.

Keywords

Aluminium alloys; Pitting corrosion; Fatigue crack initiation.

Aluminium alloys; Pitting corrosion; Fatigue crack initiation.

How to refer

Zupanc, U.; Grum, J.. INFLUENCE OF SHOT PEENED ALUMINIUM ALLOY 7075- T651 ON FATIGUE AND CORROSION RESISTANCE , p. 4777-4787. In: 65º Congresso ABM, Rio de Janeiro, 2010.
ISSN: 2594-5327 , DOI 10.5151/2594-5327-17034