Influence of surface treatments on surface layer properties, fatigue and corrosion fatigue performance of AA7075 T73

Mhaede, Mansour

doi:10.1016/j.matdes.2012.04.056

Cited by 91 publications

(53 citation statements)

References 17 publications

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“…Under optimal peening conditions, average microhardness and compressive residual stress are 178.2 Hv (about 13% higher than that of the unpeened sample) and À335.29 MPa, respectively. Similar results were presented in Mhaede et al [3]. (5) Shot peening does not cause a phase change, but makes the FWHM to become broader, which can be attributed to the grain refinement and dislocation arrangement.…”

Section: Discussionsupporting

confidence: 86%

“…The average hardness is 178.2 Hv, which is 13% higher than that of the unpeened hardness of 157.3 Hv. Mhaede [3] reported that the maximum hardness after shot peening is 10% higher than that of the unpeened surface with AA 7075 alloy. Rodopoulos et al [15] investigated the 2024-T351 aluminum alloys by controlled shot peening, where the maximum hardness after shot peening is 23% higher than that of the unpeened surface.…”

Section: Discussionmentioning

confidence: 99%

“…Thus, the performance of shot peening will be a balance between beneficial compressive residual stresses and detrimental effects on surface quality. Due to its relatively low cost and high efficiency, this process has been widely employed in the aerospace industry [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

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Enhancing surface layer properties of an aircraft aluminum alloy by shot peening using response surface methodology

et al. 2015

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Section: Discussionsupporting

confidence: 86%

Section: Discussionmentioning

confidence: 99%

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Enhancing surface layer properties of an aircraft aluminum alloy by shot peening using response surface methodology

et al. 2015

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“…The following can be confirmed based on the performed residual stress measurements and cyclic polarization tests: a) SP induced plastic deformation increased the surface layer hardness and introduced significant levels of residual compressive stresses, which was the highest at Almen intensity of 8A and ageing temperature 170 °C amounting to the maximal value of −215 MPa at the depth of 250 μm. The increasing of the Almen intensity increases the residual stresses magnitude and penetration depth, while using different media results in the same residual stress profiles as long as the Almen intensity remains constant [3]. b) The calculated values of corrosion rate (C.R.)…”

Section: Resultsmentioning

confidence: 99%

“…Mhaede [3] studied the effects of various process parameters of shot peening and ball-burnishing on the surface layer properties, i.e. surface roughness, microhardness and residual compressive stresses, fatigue and corrosion fatigue properties of Al-alloy AA7075 T73.…”

Section: Introductionmentioning

confidence: 99%

Roughness, residual stresses and pitting corrosion effect on shot peened AA 7075

Žagar

Grum

2015

Teh. vjesn.

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Original scientific paper The paper deals with the effect of roughness, residual stresses and pitting corrosion on different shot peened (SP) ENAW 7075 aluminium alloy in different states. Suitable residual stress profile increases the applicability and life cycle of mechanical parts, treated by shot peening. Pitting corrosion has a major influence on aging of structural elements made of high strength aluminium alloys as corrosion pits lead to earlier fatigue crack initiation under tensile dynamic loading. In order to improve material resistance to corrosion fatigue it is necessary to reduce pit-tip stresses. To eliminate or reduce pit stresses, shot peening was proposed. The objective of the research was to establish the optimal parameters of the shot peening treatment of the aluminium alloy in different precipitation hardened states with regard to residual stress profiles and corrosion resistance. The analysis indicated that particles such as Al7Cu2Fe and MgZn2 play an important role in pitting corrosion and after SP the number and size of surface pits was reduced.Keywords: aluminium alloy; corrosion resistance; pitting corrosion; residual stresses; roughness; shot peening Hrapavost, zaostala naprezanja i točkasta korozija na sačmarenom AA 7075Izvorni znanstveni članak Rad analizira učinak hrapavosti, zaostalih naprezanja i točkaste korozije na sačmarenoj ENAW 7075 aluminijskoj leguri u različitim stanjima. Odgovarajući profil zaostalog naprezanja povećava primjenljivost i trajnost mehaničkih dijelova, podvrgnutih sačmarenju. Točkasta korozija uvelike utječe na starenje konstrukcijskih elemenata izrađenih od aluminijskih legura visoke čvrstoće budući da rupice nastale korozijom dovode do ranijeg stvaranja pukotina zbog zamora materijala pod vlačnim dinamičkim opterećenjem. U svrhu poboljšanja otpornosti materijala na zamor zbog korozije, potrebno je smanjiti naprezanja na rubove pukotina. Da bi se otklonila ili smanjila ta naprezanja, predloženo je sačmarenje. Cilj je istraživanja bio pronaći optimalne parametre sačmarenja aluminijske legure u raznim stanjima precipitacijskog otvrdnjavanja u odnosu na profile zaostalog naprezanja i otpornost na koroziju. Analiza je pokazala da čestice kao što su Al7Cu2Fe i MgZn2 imaju važnu ulogu u točkastoj koroziji te su se nakon sačmarenja smanjili broj i veličina pukotina na površini.

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A Review of Low‐Plasticity Burnishing and Its Applications

Zhang

Yang

et al. 2022

Adv Eng Mater

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Low‐plasticity burnishing (LPB) has been widely used in various industries. In the LPB process, when the ball moves on the material surface, plastic deformation or cold working occurs in the burnished region. Through this process, not only can LPB improve the surface integrity of metallic material components by replacing polishing in some situations, but it can also improve fatigue performance thanks to the low work hardening and the beneficial compressive residual stress (CRS). So far, extensive research has demonstrated the influence of the LPB process on surface integrity and service performance of different metallic materials, such as titanium alloys, aluminum alloys, magnesium alloys, nickel‐based superalloys, stainless steels, and carbon steels. Recent years have witnessed many innovative LPB processes and novel applications. Herein, the working principle of the LPB process is first restated. Following that, how LPB strengthens the material surface and thereby influences the mechanical performance, including the surface quality, residual stress, microstructure, microhardness, fatigue, and wear performance, is reviewed. Furthermore, the difference of surface‐strengthening effect among LPB and other surface mechanical strengthening processes is compared. Finally, the current challenges to LPB are discussed and some suggestions on its development directions are put forward.

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Influence of surface treatments on surface layer properties, fatigue and corrosion fatigue performance of AA7075 T73

Cited by 91 publications

References 17 publications

Enhancing surface layer properties of an aircraft aluminum alloy by shot peening using response surface methodology

Enhancing surface layer properties of an aircraft aluminum alloy by shot peening using response surface methodology

Roughness, residual stresses and pitting corrosion effect on shot peened AA 7075

A Review of Low‐Plasticity Burnishing and Its Applications

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