Article
Nanoscience & Nanotechnology
Baocheng Yang, Hongwu Song, Songwei Wang, Shuaifeng Chen, Shihong Zhang
Summary: This study investigates the mechanical behavior of cast A356-T6 aluminum alloy through uniaxial tensile and compressive tests. The results show negligible asymmetry in hardening behaviors between tension and compression, but significant differences in ductility. Microcracks tend to initiate at the Si and Al matrix interface during tension, while a shift in strain accommodated mechanism is observed in compression leading to superior ductility.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Bao-Cheng Yang, Shuai-Feng Chen, Hong-Wu Song, Shi-Hong Zhang, Hai-Ping Chang, Shi-Wen Xu, Zhi-Hua Zhu, Chang-Hai Li
Summary: This study comprehensively investigates the effects of microstructure coarsening and casting pores on the tensile and high-cycle fatigue properties of A356-T6 alloy. The results show that microstructure coarsening leads to the connection and thickening of eutectic regions, while casting pores have larger detrimental effects on crack initiation. A modified fatigue model considering the effects of casting pores and microstructure difference is proposed.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Jianhua Wu, Jixue Zhou, Shouqiu Tang, Xitao Wang, Qingyou Han
Summary: This study focused on using a simple quench method to study the effect of ablation water cooling on microstructural features and heat treatment response of A356 alloy. The results indicate that the simple method is suitable in simulating certain features of eutectic solidification during ablation casting, and the heat treatment response of water cooled samples is much faster than that of conventional castings. This could lead to reduced energy consumptions and significant cost savings if the heat treating process is optimized for ablation casting.
Article
Engineering, Mechanical
Ahmad Nourian-Avval, Ali Fatemi
Summary: This article investigates the fatigue performance of A356-T6 aluminum alloy under different loading conditions, revealing that fatigue cracks initiated from defects, mainly porosity, and grew on the plane of maximum principal stress. Experimental fatigue life data were predicted using small crack growth models and maximum defect size estimated by extreme value statistics, showing very good agreements with the actual fatigue lives under different loading conditions.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2021)
Article
Engineering, Mechanical
I. M. Matos, J. A. Araujo, F. C. Castro
Summary: In this study, vibration data from a transmission line in the center-west region of Brazil was used to perform fretting fatigue tests on aluminum alloy wires. Two different methodologies for life prediction were applied to variable amplitude loading conditions, and the agreement between measured and predicted lives indicated their usefulness for fatigue analysis of overhead conductors.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Engineering, Mechanical
Xu Liu, Yan-Hui Zhang, Bin Wang, Xing Sun
Summary: This study investigated the effect of mean stress on the fatigue life of welded joints with different plate thicknesses under variable amplitude loading. The results showed that reducing the mean stress increased the Miner's sum at failure in variable amplitude loading, suggesting that the fatigue design codes' recommendation of limiting the Miner's sum to 0.5 may be too conservative. Thinner plate joints exhibited better fatigue performance. New analytical models that consider both mean stress and variable amplitude loading sequence were developed to improve fatigue life prediction, which showed good agreement with test results.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Nanoscience & Nanotechnology
Anass Assadiki, Vladimir A. Esin, Remi Martinez, Warren J. Poole, Georges Cailletaud
Summary: The behavior of a A356+0.5 wt%Cu alloy used to manufacture cylinder heads was studied. Samples were solutionized, quenched and aged at 200 degrees C for different durations. The dominance of different precipitates at various aging durations was observed and validated using TEM characterization. The physics-based precipitation kinetics model showed good accuracy in predicting the yield strength of the alloy, with recent developments in growth rate equations and curvature effects taken into account.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Mechanical
Yong-chuan Duan, Fang-fang Zhang, Dan Yao, Jin-hua Hu, Rui Dong, Xu Zhao, Ying-ping Guan
Summary: A new multiscale biaxial fatigue simulation method for aluminum alloy wheels is proposed, taking into account the effects of shrinkage cavities and SDAS to reduce costs and improve the accuracy of simulation results.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Chemistry, Physical
L. Shan, C. Y. Tan, X. Shen, S. Ramesh, R. Kolahchi, M. H. Hajmohammad, D. K. Rajak
Summary: The effect of adding multi-walled carbon nanotubes (MWCNTs) to an A356 aluminum alloy was studied in this research, and it was found that the addition of MWCNTs can improve the hardness and creep lifetime of the alloy.
Article
Engineering, Mechanical
Yi-Er Guo, De-Guang Shang, Di Cai, Tian Jin, Dao-Hang Li
Summary: A fatigue life prediction method based on stress normalization was proposed to reduce the influence of material property dispersion on the life of CFRC. To consider the effect of temperature on fatigue damage, a temperature influence factor was introduced into the fatigue limit equation, and a life prediction method under variable amplitude loading at high temperature was developed. The proposed method was validated using experimental results of composite multidirectional laminates under constant and variable amplitude loadings at various temperatures, with prediction errors within a factor of 5.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Nanoscience & Nanotechnology
Hanieh Azimi, Salman Nourouzi, Roohollah Jamaati
Summary: The study investigated the effects of Ti powder addition and T6 heat treatment on the microstructure and mechanical properties of A356-based composites. It was found that the addition of Ti led to changes in silicon nucleation, size, and porosity, with the T6 heat treatment transforming the eutectic Si structure. The composite with 0.5 wt% Ti showed the highest ultimate tensile strength among all samples, with improvements in hardness and tensile strength compared to the A356 alloy attributed to the presence of Ti and Al3Ti phases. The fracture surface of the A356/Ti composites was mainly covered by cleavage features.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Aina Opsal Bakke, Lars Arnberg, Yanjun Li
Summary: The research explores a novel surface coating method using hot-dip Sn-coating to achieve high-quality bonding between cast aluminum alloy A356 and commercially pure copper. Results show a maximum ultimate tensile strength of 90.8 MPa for the bimetal interface, with discussions on the effects of Sn-coating on wettability and interfacial microstructure formation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Metallurgy & Metallurgical Engineering
Naoki Sahara, Reiya Ikeda, Shaohua Wu, Mitsuhiro Okayasu
Summary: This study experimentally examines the influence of sodium on the microstructural characteristics and mechanical properties of die-cast Al-Si-Cu-Mg (ADC12) alloy. The addition of 0.03% Na improves the mechanical properties by modifying the shape of Si eutectic particles. However, adding 0.04% Na or more leads to a decrease in mechanical properties due to the formation of shrinkage porosity. Furthermore, a T5 treating enhances the mechanical properties of Na-containing ADC12 alloy through the significant precipitation of fine CuAl2 and Mg2Si, while T6-treated samples show lower mechanical properties due to the formation of blister defects.
INTERNATIONAL JOURNAL OF METALCASTING
(2023)
Article
Materials Science, Multidisciplinary
Jon Sertucha, Jacques Lacaze
Summary: Cast irons are easy to shape by sand casting due to high eutectic fraction, but obtaining good quality castings is challenging. Casting defects are classified into three classes: related to sand mixtures, mold design, and casting alloy. The paper provides a detailed description and classification of these defects, as well as attempts to clarify possible cross-effects among them.
Article
Chemistry, Physical
Mei-Lan Hu, Lei Yang, Wen Yi, Ai-Sheng Zhang, Hong-Min Guo
Summary: The mechanism of formation of entrainment defects in semi-solid A356 aluminum alloy during the preparation process has been studied. The defects include bifilm defects, bubble trails, gas pores, and shrinkage pores, which negatively affect the mechanical and comprehensive properties of the casting.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Ahmad Nourian-Avval, Ebrahim Asadi
COMPUTATIONAL MATERIALS SCIENCE
(2018)
Article
Metallurgy & Metallurgical Engineering
Shahram Kheirandish, Ahmad Noorian
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2008)
Article
Materials Science, Multidisciplinary
M. Kazemi, A. R. Kiani-Rashid, A. Nourian, A. Babakhani
MATERIALS & DESIGN
(2014)
Article
Nanoscience & Nanotechnology
M. Kazemi, A. R. Kiani-Rashid, A. Nourian
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2013)
Article
Chemistry, Physical
Ahmad Nourian-Avval, Ali Fatemi
Article
Engineering, Mechanical
Ahmad Nourian-Avval, Ali Fatemi
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2020)
Article
Materials Science, Multidisciplinary
Ahmad Nourian-Avval, Ali Fatemi
MATERIALS TODAY COMMUNICATIONS
(2020)
Article
Engineering, Mechanical
Ahmad Nourian-Avval, Ali Fatemi
Summary: This article investigates the fatigue performance of A356-T6 aluminum alloy under different loading conditions, revealing that fatigue cracks initiated from defects, mainly porosity, and grew on the plane of maximum principal stress. Experimental fatigue life data were predicted using small crack growth models and maximum defect size estimated by extreme value statistics, showing very good agreements with the actual fatigue lives under different loading conditions.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2021)
Article
Engineering, Mechanical
A. Nourian-Avval, M. M. Khonsari
Summary: This paper proposes a model for predicting fatigue life under multiaxial loading based on dissipated heat during fatigue tests, evaluating fatigue damage by considering different rates of dissipated energy under various multiaxial loadings. The predictive capability of the models is confirmed through comparison with experimental fatigue results.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Engineering, Mechanical
A. Nourian-Avval, M. M. Khonsari
Summary: This paper focuses on the rapid prediction of medium- and high-cycle fatigue performance of materials using the thermography approach. A model is proposed to estimate the damaging and non-damaging parts of heat dissipation during cyclic loading, and the concept of fracture fatigue entropy is utilized to quickly generate stress-life diagrams. It is mathematically shown that dissipating energy is directly proportional to steady-state temperature, enabling the prediction of fatigue performance by measuring steady-state temperatures during stepwise testing.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Mechanics
Scott E. Julien, Ahmad Nourian-Avval, Wentao Liang, Tricia Schwartz, Ozan C. Ozdemir, Sinan Muftu
Summary: This study investigated the tensile and fracture anisotropy in helium-sprayed bulk Al 6061 cold spray deposits. The results showed no in-plane anisotropy in tensile properties, while the fracture toughness exhibited mild transverse isotropy. The low level of anisotropy was attributed to effective spray parameters and the usage of helium gas, ensuring good interparticle bonding.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Materials Science, Multidisciplinary
Ahmad Nourian-Avval, Ebrahim Asadi
COMPUTATIONAL MATERIALS SCIENCE
(2017)