Precise analysis of effects of aging on mechanical properties of cast ADC12 aluminum alloy

Okayasu, Mitsuhiro; Go, Shoka

doi:10.1016/j.msea.2015.04.072

Cited by 17 publications

(14 citation statements)

References 16 publications

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“…Therefore, a proper understanding of this response in the A356 alloy is needed. Some applications of this alloy include cylinder heads, engine blocks, and wheels 13 . As most of components are often subjected to cyclic loading, understanding the fatigue properties of these cast aluminum alloys is critical to their successful applications.…”

Section: Introductionmentioning

confidence: 99%

Effects of strontium addition and T6 heat treatment on uniaxial fatigue of A356 aluminum alloy: Fatigue life and cyclic behavior

Verran

2022

Fatigue Fract Eng Mat Struct

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The effects of strontium addition and T6 heat treatment on fatigue behavior of A356 aluminum alloy were studied in this paper. Uniaxial fatigue tests were carried out by using constant stress amplitude. In addition, microstructural analysis of porosity and fracture surface were performed on the material. Results showed that the alloy at T6 conditions presented the best fatigue life, mainly in low cycle fatigue. In high cycle fatigue, the fatigue life of as-cast and heat treatment alloys almost converged to the same alternating stress. The strontium modified alloys presented higher porosity levels than unmodified ones, which reduced the fatigue life. The stress-strain hysteresis loops showed that the A356 + T6 alloy reached the highest total strain ranges and that depending on the stress level applied, the alloy may or not present cyclic hardening. The fracture analysis revealed porosity near the surface was the main fatigue failure nucleation site for strontium modified alloys.

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Section: Introductionmentioning

confidence: 99%

Effects of strontium addition and T6 heat treatment on uniaxial fatigue of A356 aluminum alloy: Fatigue life and cyclic behavior

Verran

2022

Fatigue Fract Eng Mat Struct

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“…Some of these As-ADC12-CNT samples were heat treated to enhance their mechanical properties. Two heat treatment processes were used: the solid solution at 500°C for 1 h (Ss) and T6 treatment (Ss + artificial aging at 173°C for 13 h (Ag)) [6]. Namely, six samples were prepared in the present work, which is summarised in Table 1.…”

Section: Materials and Sample Preparationmentioning

confidence: 99%

“…To understand the reason for the high internal strain in the Ag-0.3%CNT sample, STEM observations were carried out. Figure 7(a) shows the STEM images of the cast samples with and without CNTs after the aging process [6]. Moreover, in the Ag-0.3%CNT sample, a fine precipitation is detected with a high density in the α-Al matrix.…”

Section: Microstructural Characteristicsmentioning

confidence: 99%

Effect of carbon nanotubes on the mechanical properties of cast Al–Si–Cu alloys

Okayasu

Hasanah

2022

Materials Science and Technology

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To enhance the mechanical properties of cast Al–Si–Cu alloys (ADC12), 0.3% of carbon nanotubes (CNTs) was added. The cast ADC12–0.3%CNT samples were synthesised via heated mould continuous casting for the creation of fine grains, and the artificial aging process was conducted at 173°C for 13 h to obtain precipitation hardening. The reinforcement and refinement of eutectic Si and precipitates (Al2Cu and Mg2Si) were achieved by adding CNTs, which leads to a high tensile strength of about 450 MPa and a relatively high ductility of about 10%. The obtained tensile strength and 0.2% proof stress are more than twice as high as those of the conventional cast ADC12 alloy. The refinement of the microstructures could be due to the interruption of their growth caused by the CNTs.

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“…According to related literature, the cutoff point of the number of failure cycles in low-cycle fatigue and high-cycle fatigue tests is 5 Â 10 4 . 33 From the S-N curve of the material, it is known that the load stress corresponding to the fatigue life of 5 Â 10 4 is 155 MPa. Combining the two-dimensional program load spectrum and the fatigue limit stress limit of the sample, the lowload stress in the fatigue test selects the stress corresponding to the two-dimensional program load spectrum is 111.495 MPa, and the high-load stress selects the corresponding stress in the two-dimensional program load spectrum is 163.403 MPa.…”

Section: Relevant Parameters To S-n Curvementioning

confidence: 99%

“…Therefore, two stress values are selected for the test load, namely, low‐load stress and high‐load stress, high‐cycle fatigue, and low‐cycle fatigue. According to related literature, the cutoff point of the number of failure cycles in low‐cycle fatigue and high‐cycle fatigue tests is 5 × 10 4 33 . From the S‐N curve of the material, it is known that the load stress corresponding to the fatigue life of 5 × 10 4 is 155 MPa.…”

Section: Relevant Parameters To S‐n Curvementioning

confidence: 99%

An improved fatigue life model for mechanical components considering load strengthening characteristics

Liu

Zhang

et al. 2021

Fatigue Fract Eng Mat Struct

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The small load has fuzziness on the strengthening and damage of the component under the action of random fatigue load. This paper introduces the two-dimensional membership function in fuzzy mathematics to characterize the relationship between stress amplitude, mean value, and damage below the fatigue limit. An exponential function is used to describe the strengthening effect. Under the two-dimensional load spectrum, the influence of various levels on the component's life is comprehensively considered, and the fatigue life prediction model under random load is proposed. Through the small sample experiment of the car swing support rod, the relevant parameters of the model are obtained. The difference between the modified two-dimensional and the two-dimensional load spectrum is compared in fatigue life prediction results. The rules of membership function selection and parameter setting are summarized, and it makes the estimation of component load spectrum life more reasonable.

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Precise analysis of effects of aging on mechanical properties of cast ADC12 aluminum alloy

Cited by 17 publications

References 16 publications

Effects of strontium addition and T6 heat treatment on uniaxial fatigue of A356 aluminum alloy: Fatigue life and cyclic behavior

Effects of strontium addition and T6 heat treatment on uniaxial fatigue of A356 aluminum alloy: Fatigue life and cyclic behavior

Effect of carbon nanotubes on the mechanical properties of cast Al–Si–Cu alloys

An improved fatigue life model for mechanical components considering load strengthening characteristics

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