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Effect of post weld heat treatment on microstructure and mechanical properties of gas tungsten arc welded AA6061-T6 alloy

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Transactions of Nonferrous Metals Society of China 2016年第12期26卷 3102-3114页

作者： Firouz FADAEIFARD khamirul amin matori Farhad GARAVI Muath Al-FALAHI Gholamreza Vahedi SARRIGANI Materials Synthesis and Characterization Laboratory Institute of Advanced TechnologyUniversiti Putra Malaysia Department of Physics Faculty of ScienceUniversiti Putra Malaysia

Double-V butt TIG welding process was performed on two plates of AA6061-T6 using ER5356 filler. The microstructure,mechanical and nanomechanical properties of the joint were evaluated in as-welded and after post weld heat treatment (PWHT) usingXRD, FESEM, EBSD, nanoindentation and tensile tests. The results show that PWHT led to microstructural recovery of the heataffected zone (HAZ) in addition to the appearance of β-phase (Al3Mg2) at the grain boundaries of weld zone. The hardness (Hnano) inall zones increased after PWHT while the elastic modulus (Enano) was improved from 69.93 GPa to 81 GPa in weld area. All resultsindicate that PWHT has created a homogenous microstructure in the weld zone in addition to outstanding improvement inmechanical properties for the weld zone which surpass the base metal.

关键词： AA6061-T6 alloy ER5356 gas tungsten arc welding post weld heat treatment nanoindentation microstructure

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Process−microstructure−properties relationship in Al−CNTs−Al2O3 nanocomposites manufactured by hybrid powder metallurgy and microwave sintering process

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Transactions of Nonferrous Metals Society of China 2020年第9期30卷 2339-2354页

作者： Meysam TOOZANDEHJANI Farhad OSTOVAN Khairur Rijal JAMALUDIN Astuty AMRIN khamirul amin matori Ehsan SHAFIEI Razak Faculty of Technology and Informatics Universiti Teknologi Malaysia Kuala Lumpur54100 Jalan SemarakKuala LumpurMalaysia Department of Material Science and Engineering Islamic Azad UniversityBandar Abbas BranchBandar AbbasHormozganIran Department of Physics Faculty of ScienceUniversiti Putra Malaysia43400SerdangSelangorMalaysia

Al−2CNTs−xAl2O3 nanocomposites were manufactured by a hybrid powder metallurgy and microwave sintering *** correlation between process-induced microstructural features and the material properties including physical and mechanical properties as well as ultrasonic parameters was *** was found that physical properties including densification and physical dimensional changes were closely associated with the morphology and particle size of nanocomposite *** maximum density was obtained by extensive particle refinement at milling time longer than 8 h and Al2O3 content of 10 wt.%.Mechanical properties were controlled by Al2O3 content,dispersion of nano reinforcements and grain *** optimum hardness and strength properties were achieved through incorporation of 10 wt.%Al2O3 and homogenous dispersion of CNTs and Al2O3 nanoparticles(NPs)at 12 h of milling which resulted in the formation of high density of dislocations and extensive grain size *** both longitudinal and shear velocities and attenuation increase linearly by increasing Al2O3 content and milling *** variation of ultrasonic velocity and attenuation was attributed to the degree of dispersion of CNTs and Al2O3 and also less inter-particle spacing in the *** larger Al2O3 content and more homogenous dispersion of CNTs and Al2O3 NPs at longer milling time exerted higher velocity and attenuation of ultrasonic wave.

关键词： hybrid composite aluminum composites powder metallurgy microwave sintering microstructure mechanical properties ultrasonic velocity ultrasonic attenuation

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Elastic Moduli of Zinc Oxyfluorotellurite Glasses

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材料科学与工程（中英文版） 2011年第3期5卷 319-322页

作者： Sidek Haji Ab Aziz Rosmawati Sharuddin khamirul amin matori Halimah Mohamed Kamari Department of Physics Faculty of Science Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia

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Influence of rotational speed on mechanical properties of friction stir lap welded 6061-T6 Al alloy

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Transactions of Nonferrous Metals Society of China 2014年第4期24卷 1004-1011页

作者： Firouz FADAEIFARD khamirul amin matori Meysam TOOZANDEHJANI Abdul Razak DAUD Mohd Khairol Anuar Mohd ARIFFIN Norinsan Kamil OTHMAN Farhad GHARAVI Abdul Hadi RAMZANI Farhad OSTOVAN Materials Synthesis and Characterization Laboratory Institute of Advanced TechnologyUniversiti Putra Malaysia Department of Physics Faculty of Science Universiti Putra Malaysia Department of Mechanical and Manufacturing Faculty of Engineering Universiti Putra Malaysia School of Applied Physics Faculty of Science and Technology Universiti Kebangsaan Malaysia

The effect of rotational speed on macro and microstructures, hardness, lap shear performance and failure mode of friction stir lap welding on AA6061-T6 Al alloy with 5 mm in thickness was studied by field-emission scanning electron microscopy （FE-SEM）. The results represent much closer hardness distribution in the upper and lower plates at the lowest rotational speed. It indicates the Fe-compounds in the fracture surface of the nugget zone by EDX.

关键词： aluminum alloy friction stir lap welding mechanical properties

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