Browsing by Author "Chang, Chin-Chun"

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Effect of dissimilar welding on mechanical properties of A7050 and A2024 aluminum alloy
(2011)
Chang, Chin-Chun
;
Yang, Ji-Gang
;
Qi-Ling
;
Chou, Chang-Pin
;
機械工程學系
The effect of dissimilar welding of 7050/2024 aluminum alloy on mechanical properties and microstructure were analyzed and investigated. The post-welding heat treatments of weldments were carried out and recorded for microstructure, tensile test, hardness and fracture surface in different conditions. The experimental results indicate that the post-welding heat treatment, filler metal chose can increase the mechanical properties. The microstructure and fracture surface of dissimilar welding can evaluate the distribution of precipitation strengthening phase in fusion zone, heat: affected zone and its fracture type.
The Study of the Relationships between Material Properties and Welding Residual Stresses
(2010-01-01)
Tsai, Yao-Long
;
Chang, Chin-Chun
;
Chou, Chang-Pin
;
機械工程學系
;
Department of Mechanical Engineering
The objective of this study is to explore the influence of the steel's material properties on the distribution of welding residual stresses of the butt-welded steel plate. First, S15C carbon steel's material properties are varied in this study to calculate the corresponding welding residual stress by carrying out 3D finite element analyses. Results show the maximum longitudinal tensile residual stresses increase linearly with increasing thermal expansion coefficient and increasing yield stress. The length of the tensile residual stress zone decreases linearly with increasing thermal conductivity. Finally, based on the relationship between material properties and welding residual stresses, a useful prediction equation is developed and verified in this study.
The Study of the Relationships between Material Properties and Welding Residual Stresses
(2010-01-01)
Tsai, Yao-Long
;
Chang, Chin-Chun
;
Chou, Chang-Pin
;
機械工程學系
;
Department of Mechanical Engineering
The objective of this study is to explore the influence of the steel's material properties on the distribution of welding residual stresses of the butt-welded steel plate. First, S15C carbon steel's material properties are varied in this study to calculate the corresponding welding residual stress by carrying out 3D finite element analyses. Results show the maximum longitudinal tensile residual stresses increase linearly with increasing thermal expansion coefficient and increasing yield stress. The length of the tensile residual stress zone decreases linearly with increasing thermal conductivity. Finally, based on the relationship between material properties and welding residual stresses, a useful prediction equation is developed and verified in this study.