Diffusion bonding of 7475 aluminum alloy and evaluation of bonding strength and fatigue strength.
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概要
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SPF/DB (Superplastic forming/Diffusion bonding) joints of 7475 aluminum alloy were produced, where various surface finishes and use of insert materials for removing surface oxide film were attemped. SPF/DB using a cryogenic rolling sheet of 7475 aluminum alloy brought better results of bonding and fatigue strength than that using a conventional cold rolling sheet. Surface finish was required to obtain high-quality bond, but Ag insert material was enable SPF/DB without surface finish for thin and weak oxide films. 5052 aluminum alloy was not effective as the insert material. From the results of fatigue life prediction based on the fracture mechanics analysis, it was considered that the fatigue strength of the cryogenic rolling sheet bonded specimen was almost equivalent to that of the bulk specimen.
- 一般社団法人 軽金属学会の論文
一般社団法人 軽金属学会 | 論文
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