Effect of Heat Treatment on Strain Life of Aluminum Alloy AA 6061

Abood, Adnan N.; Saleh, Ali Hassan; Abdullah, Zainab Waheed

doi:10.5539/jmsr.v2n2p51

Cited by 17 publications

(18 citation statements)

References 15 publications

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“…The 6xxx-series aluminum alloys are extensively used in the aerospace and automotive industries, owing to their ideal mechanical properties, good corrosion resistance, as well as good formability and weldability [1][2][3][4]. There is considerable industrial interest in these alloys, as two thirds of all extruded products are made of aluminum, and 90% of these are made of the 6xxx-series alloys [4].…”

Section: Introductionmentioning

confidence: 99%

“…There is considerable industrial interest in these alloys, as two thirds of all extruded products are made of aluminum, and 90% of these are made of the 6xxx-series alloys [4]. AA6061 alloys are one of the most widely used precipitation-hardening aluminum alloys in the 6xxx series [2,3,5]. Structural components of AA6061 alloys used in engineering services would require the evaluation of their mechanical performance under cyclic loads, because these components would unavoidably experience dynamic loading in service, which leads to the occurrence of fatigue failure [2,6,7].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Overaging on the Cyclic Deformation Behavior of an AA6061 Aluminum Alloy

Liu

Mirza

Chen

2018

Metals

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The present work encompasses the effect of overaging on the strain-controlled low-cycle fatigue (LCF) behavior of an extruded AA6061 aluminum alloy at varying strain amplitudes. During the T7 aging treatment, the size of precipitates increased from 60 nm under T6 conditions to 220 nm after aging for 48 h at 200 • C, leading to a decrease in the monotonic tensile strength. During the LCF tests, nearly symmetrical hysteresis loops can be observed in the mid-life cycle under all test conditions, whereas the first-cycle hysteresis loops were moderately inflected under long-aging conditions. With increasing aging time, the cyclic peak stresses decreased and the plastic strain increased. Nearly ideal Masing behavior was exhibited under T6 conditions, while it was lost under T7 overaging conditions. The cyclic stress responses were similar under all tested conditions, involving stabilization at low strain amplitudes and softening at high strain amplitudes, with initial hardening for the first few cycles. Compared to the T6 condition, the fatigue life increased with increasing T7 aging time. Various LCF parameters were estimated based on the Coffin-Manson and Basquin relationships and on the LCF experimental results. The relationship between the fatigue life, strength, and microstructure of the investigated AA6061 aluminum alloy under various aging conditions was discussed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Overaging on the Cyclic Deformation Behavior of an AA6061 Aluminum Alloy

Liu

Mirza

Chen

2018

Metals

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“…In case of Al alloys, significant improvements in low cycle fatigue [5] and high cycle fatigue [3] were reported by employing shot peening at optimized parameters. K. A. Soady et al [6] investigated the effect of shot peening on notched low cycle fatigue of heat resistant alloy and revealed substantial improvements.…”

Section: Introductionmentioning

confidence: 99%

Influence of Shot Peening on DIN 1.2714 Hot Work Tool Steel

Bhavar¹,

Patil²,

Kattire³

et al. 2017

MSCE

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Shot peening is one of the most popular surface enhancement technique used to improve fatigue performance of different materials. This paper focuses on to study the effect of different shot peening parameters on micro-structural and mechanical properties of DIN 1.2714 tool steel specimens. Shot peening treatments were carried out by varying shot size and peening intensity. X-ray stress analysis, micro-hardness testing and micro-structural analysis were performed to characterize these specimens. In addition, pin on disk wear testing was executed to recognize wear behavior of this shot peened tool steels. It was observed that along with compressive residual stress generation, shot peening also induces work hardening effect and modifies surface structure which are responsible for significant improvement in this tool steel.

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“…Aluminium alloys have become important materials for space, military, automobile and various commercial applications due to their higher specific strength, low density and specific modulus apart from adequate fracture and fatigue resistance. A few attempts have been made in the past to study deformation behaviour of aluminium alloys for sheet metal applications [1][2][3]. Earlier studies also reported formability characteristics and forming limits of the AA 2014 automotive aluminium sheets [4,5].…”

Section: Introductionmentioning

confidence: 99%

In-plane anisotropy and tensile deformation behaviour of aluminium alloy AA 2014 forge plates

2019

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Plastic flow behaviour and fracture mechanism of aluminium alloy AA 2014 forged plates under tensile loading conditions are investigated and the results obtained are presented and discussed in the present study. The effects of heat treatment (namely, solution treatment and artificial ageing) on micro-structural homogeneity, tensile behaviour and nature of fracture were studied using hardness, tensile, optical and scanning electron microscopy methods. Experimental engineering stress-engineering strain and true stress-true strain data of the aluminium alloy AA 2014 in different ageing conditions have been analysed using Hollomon, Ludwik and Ludwigson plastic flow relationships. The alloy is found to exhibit moderate degree of in-plane anisotropy and anisotropic index. Further, the alloy in both solution-treated and aged conditions exhibits three different stages of strain-hardening rate and the highest strain-hardening rate occurs at regions of lower strain both in solution-treated and peak-aged conditions. It is also observed that the longitudinal specimen (L parallel to forging direction) exhibits higher strain hardening, while the specimen with T orientation exhibits lowest strain-hardening rates both in solution-treated and aged conditions. The alloy under study in all the heat treatment conditions exhibits ductile fracture mechanism with higher density of uniformly distributed macro-and micro-dimples.Keywords. Aluminium alloy AA 2014; in-plane anisotropy; strain hardening; fracture mechanism; anisotropic index; plastic flow. Sådhanå (2019) 44:22 Ó Indian Academy of Sciences https://doi.org/10.1007/s12046-018-0994-8S adhana(0123456789().,-volV)FT3 ](0123456789().,-volV)

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Effect of Heat Treatment on Strain Life of Aluminum Alloy AA 6061

Cited by 17 publications

References 15 publications

Effect of Overaging on the Cyclic Deformation Behavior of an AA6061 Aluminum Alloy

Effect of Overaging on the Cyclic Deformation Behavior of an AA6061 Aluminum Alloy

Influence of Shot Peening on DIN 1.2714 Hot Work Tool Steel

In-plane anisotropy and tensile deformation behaviour of aluminium alloy AA 2014 forge plates

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