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Ulises Alfaro Mercado - One of the best experts on this subject based on the ideXlab platform.
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friction stir welding of titanium Alloy tial6v4 to Aluminium Alloy aa2024 t3
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2009Co-Authors: Ulrike Dressle, Gerhard Iallas, Ulises Alfaro MercadoAbstract:Abstract Titanium Alloy TiAl6V4 and Aluminium Alloy 2024-T3 were successfully joined by friction stir welding. Microstructure, hardness and tensile strength of the butt joint were investigated. The weld nugget exhibits a mixture of fine recrystallized grains of Aluminium Alloy and titanium particles. Hardness profile reveals a sharp decrease at titanium/Aluminium interface and evidence of microstructural changes due to welding on the Aluminium side. The ultimate tensile strength of the joint reached 73% of AA2024-T3 base material strength.
Ulrike Dressle - One of the best experts on this subject based on the ideXlab platform.
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friction stir welding of titanium Alloy tial6v4 to Aluminium Alloy aa2024 t3
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2009Co-Authors: Ulrike Dressle, Gerhard Iallas, Ulises Alfaro MercadoAbstract:Abstract Titanium Alloy TiAl6V4 and Aluminium Alloy 2024-T3 were successfully joined by friction stir welding. Microstructure, hardness and tensile strength of the butt joint were investigated. The weld nugget exhibits a mixture of fine recrystallized grains of Aluminium Alloy and titanium particles. Hardness profile reveals a sharp decrease at titanium/Aluminium interface and evidence of microstructural changes due to welding on the Aluminium side. The ultimate tensile strength of the joint reached 73% of AA2024-T3 base material strength.
I. Roman - One of the best experts on this subject based on the ideXlab platform.
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Study of hydrogen embrittlement in Aluminium Alloy 2024 in the longitudinal direction
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 1990Co-Authors: F. Zeides, I. RomanAbstract:Abstract A comparative study of the hydrogen effect on overall ductility in the rolling direction of Aluminium Alloy 2024 in the T351 temper condition and Aluminium Alloy 2024 aged at 190°C for 7 h has been conducted. Hydrogen-pre-charged and hydrogen-free sheet tensile specimens have been tested at either a constant or an alternating strain rate. It has been found that internal hydrogen caused severe degradation in overall plastic elongation of Aluminium Alloy 2024-T351 and that in artificially aged Alloy 2024 the embrittlement was observed only after the onset of necking. It has been observed that hydrogen-induced modification of the strain rate dependence of flow stress by reducing dynamic hardening in Alloy 2024-T351 aged at 190°C for 7 h and enhancing dynamic softening in Alloy 2024-T351. It is suggested that hydrogen embrittlement is caused by hydrogen-induced enhancement of plastic deformation localization that mainly affects non-uniform plastic deformation.
Aijun Huang - One of the best experts on this subject based on the ideXlab platform.
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Correlation of textures and hemming performance of an AA6XXX Aluminium Alloy
Journal of Alloys and Compounds, 1Co-Authors: Kai Zhang, Jeremy H. Rao, Yuan Wang, Ruifeng Zhang, Xini Yuan, Weijun Feng, Aijun HuangAbstract:Abstract The hemming process is one of the most commonly used forming processes for Aluminium Alloys in the automotive industry and requires bending the Aluminium Alloy sheet to 180° without generating cracks or surface cosmetic defects. However, existing commercial Al–Mg–Si Alloys (AA6xxx Aluminium Alloys) used in the automotive industry could easily fail during the hemming process. Textures in sheet Aluminium Alloys are commonly known as influential in the deformation behaviour and surface defect formation, while a comprehensive correlation of textures and hemming performance of Aluminium Alloy sheets is not well established. In this work, the influence of different texture components on the hemming behaviour of an AA6XXX Aluminium Alloy sheet was thoroughly investigated. The hemming testing was carried out using samples taken along rolling and transverse directions and a quantitative approach via profilometer was used to measure the hemming performance. The detailed grain orientation spread analysis, Taylor factor and Schmid factor analysis with different texture components from EBSD characterizations show that the dominance of Cube and CubeND texture component contributes to the hemming performance. CubeRD and Goss texture components could only benefit the hemming performance at one of the bending directions. In contrast, Brass and Goss texture components in Bent_RD and P component in Bent_TD may not be preferred for the hemming performance.
Gerhard Iallas - One of the best experts on this subject based on the ideXlab platform.
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friction stir welding of titanium Alloy tial6v4 to Aluminium Alloy aa2024 t3
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2009Co-Authors: Ulrike Dressle, Gerhard Iallas, Ulises Alfaro MercadoAbstract:Abstract Titanium Alloy TiAl6V4 and Aluminium Alloy 2024-T3 were successfully joined by friction stir welding. Microstructure, hardness and tensile strength of the butt joint were investigated. The weld nugget exhibits a mixture of fine recrystallized grains of Aluminium Alloy and titanium particles. Hardness profile reveals a sharp decrease at titanium/Aluminium interface and evidence of microstructural changes due to welding on the Aluminium side. The ultimate tensile strength of the joint reached 73% of AA2024-T3 base material strength.