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Expulsion characterization in resistance spot welding by means of a hardness mapping techniqueH.Ghazanfari,M.NaderiDepartment of Mining and Metallurgy, AmirKabir University of Technology,424 Hafez... the detection and characterization of expulsion events is significant for the quality assurance of resistance spot welds. In this study, hardness mapping, using a scanning hardness machine, was used......
Effect of homogenization process on the hardness of Zn–Al–Cu alloysJose D.Villegas-Cardenas1,2,Maribel L.Saucedo-Mu?oz1,Victor M.Lopez-Hirata1,Erika O.Avila-Davila1,Jorge Luis Gonzalez-Velazquez11... on the hardness of as-cast Zn–Al–Cu alloys was investigated. Eight alloy compositions were prepared and homogenized at 350 °C for 180 h, and their Rockwell "B" hardness was subsequently measured. All......
Hardness Measurement of (TiB2-TiAl)/TiAl Symmetrically Function Gradient Materials梅炳初摘 要:( TiB2-TiAl)/TiAl symmetrically function gradient materials ( FGM... the thermal expansion mismatch. The hardness values of the uniform materials and the FGM were tested, respectively. For the FGM with a compressive surface stress, hardness is obviously superior......
Effect of δ Phase on Microstructure and Hardness of Heat-Affected Zone in TIG-Welded GH4169 SuperalloyTian-Fu Wang,Xin-Jie Di,Cheng-Ning Li,Jia-Mei Wang,Dong-Po Wang摘 要:The GH4169 superalloy with different content of δ-Ni3Nb phase was welded by tungsten inert gas welding.A detailed study of microstructure and hardness of heat-affected zone(HAZ......
that the penetration with flux is 3 times as great as the weld without flux. With activating flux, mechanical properties are stable, but the hardness of welding with flux is higher in some extent... transformation. Key words: activating flux; elements transition; hardness 活性化焊接(Activating TIG,简称A-TIG) 方法是使用特殊的活化材料焊前涂敷到被焊工件表面,在焊接工艺参数不变的情况下,与常规的TIG焊相比,增大熔深1倍以上,而且有效减小正面焊缝宽 度[1-2......
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Effect of Valence Electron Structure on Temper Process and Hardness of the Supersaturated Carburized Layer石巨岩College of Materials Science and Engineering,Taiyuan University of Technology摘 要:By measuring the hardness of carburized layer of a new type supersaturated carburizing steel (35Cr3SiMnMoV) at different temper temperature for 2 h, the relationship......
Microstructure, Texture, and Hardness Evolutions of Al-Mg-Si-Cu Alloy during Annealing Treatment汪小锋1,MA Cunqiang2,MA Pengcheng3,ZHOU Songze1,WANG Yonggang11. Key Laboratory of Impact and Safety...="ChDivSummary">Microstructure, texture and hardness evolutions of Al-Mg-Si-Cu alloy during annealing treatment were studied by microstructure, texture and hardness characterization in the present study......
Corrosion Behavior and Hardness of Al-M (M:Mo,Si,Ti,Cr) AlloysJ.Esquivel,R.K.GuptaDepartment of Chemical and Biomolecular Engineering,The University of Akron摘 要:hardness,which was attributed to the grain refinement......
Enhancing the surface hardness and roughness of engine blades using the shot peening processMohammad A.Omari,Hamzah M.Mousa,Faris M.AL-Oqla摘 要:The effects... parameters governing surface hardness and surface roughness.The optimal time duration and pressure were determined after several experimental trials.Changes in hardness and surface roughness were monitored......
