Damage Assessment of A356 Al Alloy Under Ratcheting–Creep Interaction

Mishra, Swagatika; Roy, Himadri; Mondal, A.K.; Dutta, Krishna

doi:10.1007/s11661-017-4077-y

Cited by 6 publications

(6 citation statements)

References 20 publications

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“…An important field of this area is stress-controlled LCF accompanying mean stress, which usually results in ratcheting i.e., the progressive accumulation of the inelastic strain and consequently to premature fatigue failure. The investigation of symmetric and asymmetric stress-controlled LCF behavior of aluminum alloys had been performed during recent years in the literature [21][22][23][24][25][26] but not as extensively as steel and magnesium alloys. In the context of the stress-controlled LCF experiments on metal-matrix composites, the ratcheting deformation in 6061 aluminum alloy reinforced with SiC particulates was systematically discussed by Kang [27] and Kang and Liu [28].…”

Section: Effect Of Nano-clay Addition and Heat Treatment On Tensile And Stresscontrolled Low-cycle Fatigue Behaviors Of Aluminum-silicon mentioning

confidence: 99%

“…Regardless of the little investigations that were carried out on the strain-controlled LCF behavior of nano-composites [15][16][17][18], there was only one investigation [29] focusing on stress-controlled LCF behavior of metal matrix nano-composites to the author's best knowledge. The promising results of such loading conditions in micro-composites [27][28] and also fewer studies on stresscontrolled LCF behavior of aluminum alloys [21][22][23][24][25][26] in comparison to other metallic materials, motivated the present investigation to be made. Therefore, the objective of this article was to evaluate the effect of the addition of nano-clay particles and the heat treatment on mechanical and stress-controlled LCF properties of piston AlSi alloys.…”

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confidence: 99%

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Effect of nano-clay addition and heat-treatment on tensile and stress-controlled low-cycle fatigue behaviors of aluminum-silicon alloy: Effect of nano-clay addition and heat-treatment

Azadi

Basiri

Dadashi

et al. 2021

Frattura Ed Integrità Strutturale

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The objective of the present paper is to investigate the stress-controlled low-cycle fatigue behavior of piston aluminum-silicon (AlSi) alloy reinforced with nano-clay particles and T6 heat-treatment. The piston aluminum-silicon alloy strengthened by 1 wt.% nano-clay particles were prepared by the stir casting method and then subjected to the heat-treatment. The optical microscopy analysis demonstrates that heat-treatment changed the size, morphology, and distribution of silicon phases through the microstructure of the aluminum matrix. In addition to tensile tests, stress-controlled low-cycle fatigue experiments at different loading conditions including the variation of the mean stress, the stress rate, and the stress amplitude were conducted at room temperature. The obtained experimental results showed no clear improvement in either mechanical or fatigue properties of the material. Moreover, the density measurements using the Archimedes method reveal a higher content of the porosity in nano-composite. It was observed that the reinforcement (nano-particles and heat-treatment) can change the cyclic behavior of the AlSi alloy, significantly. The cyclic hardening feature of the AlSi alloy changed to cyclic softening and also the fatigue lifetime and the ratcheting resistance decreased after the nano-particles addition and heat-treatment. Through the microstructural analysis, it was indicated that the neglecting of higher kinematics of age hardening in nano-composite was the major source of mechanical properties reduction. In the end, it was shown that the fatigue lifetime of samples can be described adequately utilizing a modified plastic strain energy technique considering the mean stress effect.

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Section: Effect Of Nano-clay Addition and Heat Treatment On Tensile And Stresscontrolled Low-cycle Fatigue Behaviors Of Aluminum-silicon mentioning

confidence: 99%

mentioning

confidence: 99%

Effect of nano-clay addition and heat-treatment on tensile and stress-controlled low-cycle fatigue behaviors of aluminum-silicon alloy: Effect of nano-clay addition and heat-treatment

Azadi

Basiri

Dadashi

et al. 2021

Frattura Ed Integrità Strutturale

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“…A356 alloy has excellent casting properties such as good fluidity, low density and high specific strength, and has been widely used in automobile manufacturing, aircraft parts, rail transit and other industrial fields [1,2]. However, there are α-Al with coarse dendrites and eutectic Si with needle sheets in the microstructure of A356 alloy without refining modification, which breaks the continuity of the matrix and seriously affects the strength and plasticity of the alloy [3,4].…”

Section: Introductionmentioning

confidence: 99%

Effect of Zr content on microstructure and tensile properties of cast and T6 heat-treated A356-0.3Yb alloy

Ji³

et al. 2023

Mater. Res. Express

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In this paper,the influence of different Zr addition amounts on the microstructure and tensile properties of A356 alloy modified by 0.3wt%Yb in cast state and T6 heat-treated state were systematically investigated. The results show that adding Zr on the basis of 0.3wt%Yb can further refine α-Al and eutectic Si branches. When the content of Zr is 0.25wt%, α-Al has the smallest grain size of 133µm, and the aspect ratio of eutectic Si is 1.6. However, the addition of excessive Zr will weaken the modified effect of Yb and make the eutectic Si start coarsening. The addition of Zr forms the (Al,Si)3(Zr,Ti) phase with Ti in the alloy, provides the heterogeneous nucleation base, increases the number of α-Al grains, and refines the α-Al matrix. After T6 heat treatment, the eutectic Si is further spheroidized and the aspect ratio decreases to 1.3. The tensile strength and elongation of A356 alloy with Yb and Zr under cast condition are 187.4MPa and 5.6% respectively, which are 8.7% and 30% higher than those without Zr. The tensile strength and elongation of the alloy after T6 heat treatment are 296.3MPa and 9.2% respectively, which are 6.3% and 18% higher than those of the alloy without Zr.

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“…A356 (Al-7Si-0.4Mg) is a casting alloy widely applied in automotive and aeronautical fields, as referred by Mishra et al [1] and Jeong et al [2], among others. The casting alloy is age-hardenable, and, thus, its mechanical properties depend on the combination of several microstructural features, from macroscopic and microscopic ones (including dendrite arm spacing, grain size, coarse equilibrium or non-equilibrium intermetallic phases, porosities and other possible discontinuities related to casting processes) down to the presence of nanometric precipitates with noticeable strengthening effect [3,4].…”

Section: Introductionmentioning

confidence: 99%

High Temperature Behavior of Al-7Si-0.4Mg Alloy with Er and Zr Additions

Gariboldi

Confalonieri

Colombo

2021

Metals

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In recent years, many efforts have been devoted to the development of innovative Al-based casting alloys with improved high temperature strength. Research is often oriented to the investigation of the effects of minor element additions to widely diffused casting alloys. The present study focuses on Al-7Si-0.4Mg (A356) alloy with small additions of Er and Zr. Following previous scientific works on the optimization of heat treatment and on tensile strength, creep tests were carried out at 300 °C under applied stress of 30 MPa, a reference condition for creep characterization of innovative high-temperature Al alloys. The alloys containing both Er and Zr displayed a lower minimum creep strain rate and a longer time to rupture. Fractographic and microstructural analyses on crept and aged specimens were performed to understand the role played by eutectic silicon, by the coarse intermetallics and by α-Al matrix ductility. The creep behavior in tension of the three alloys has been discussed by comparing them to tension and compression creep curves available in the literature for Al-7Si-0.4Mg improved by minor elemental additions.

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Damage Assessment of A356 Al Alloy Under Ratcheting–Creep Interaction

Cited by 6 publications

References 20 publications

Effect of nano-clay addition and heat-treatment on tensile and stress-controlled low-cycle fatigue behaviors of aluminum-silicon alloy: Effect of nano-clay addition and heat-treatment

Effect of nano-clay addition and heat-treatment on tensile and stress-controlled low-cycle fatigue behaviors of aluminum-silicon alloy: Effect of nano-clay addition and heat-treatment

Effect of Zr content on microstructure and tensile properties of cast and T6 heat-treated A356-0.3Yb alloy

High Temperature Behavior of Al-7Si-0.4Mg Alloy with Er and Zr Additions

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