Zobrazeno 1 - 10
of 80
pro vyhledávání: '"Yunwu Ma"'
Autor:
Sizhe Niu, Ming Lou, Zixuan Chen, Zelong Wang, Yunwu Ma, Shanqing Hu, Haiyang Lei, Yongbing Li
Publikováno v:
Journal of Materials Research and Technology, Vol 27, Iss , Pp 6424-6437 (2023)
Resistance rivet welding (RRW) process was applied to join three-sheet of Al/steel/steel. The formation mechanism, microstructure and mechanical performance of three-sheet dissimilar materials joints were studied in detail. The Al/steel/steel mixed n
Externí odkaz:
https://doaj.org/article/3c4b9838f4a949319ecc6cba6f4d665c
Publikováno v:
Journal of Materials Research and Technology, Vol 26, Iss , Pp 3615-3628 (2023)
The aging characteristics of Al/UHSS resistance rivet welding (RRW) joints are investigated for the first time in this paper. Microstructure studies have shown that the aging treatment does not change the phase composition of the Al/steel mixed nugge
Externí odkaz:
https://doaj.org/article/dc62a03febe84eaabd90752c13abf06f
Publikováno v:
Journal of Materials Research and Technology, Vol 25, Iss , Pp 6792-6811 (2023)
The mixed use of aluminum (Al) alloy and high strength steel (HSS) is an effective way to reduce the weight of vehicles, which meanwhile brings great challenges to the traditional spot joining technologies. Three-stage friction stir riveting (FSR) pr
Externí odkaz:
https://doaj.org/article/7bc37d99274047a3a20d96e7b7d84235
Publikováno v:
Journal of Materials Research and Technology, Vol 23, Iss , Pp 5181-5192 (2023)
Friction stir welding (FSW) is a new solid-state joining process for joining light metals, such as magnesium (Mg) alloys. However, the texture-induced softening mechanism (in stir zone, SZ) tends to cause the worsening of mechanical properties in FSW
Externí odkaz:
https://doaj.org/article/94dfb04b621c4c3b88d4f3afccfe47a5
Publikováno v:
Journal of Magnesium and Alloys, Vol 10, Iss 5, Pp 1207-1219 (2022)
Friction self-piercing riveting (F-SPR) process based on a pip die has been invented to solve the cracking problems in riveting high-strength and low-ductility light metals, such as magnesium alloys, cast aluminum, and 7 series aluminum alloys. In th
Externí odkaz:
https://doaj.org/article/9b81442e3fb2472f95b301e21c2f51eb
Autor:
Ninshu Ma, Peihao Geng, Yunwu Ma, Katsushi Shimakawa, Jeong-Won Choi, Yasuhiro Aoki, Hidetoshi Fujii
Publikováno v:
Journal of Materials Research and Technology, Vol 12, Iss , Pp 1777-1793 (2021)
A three-dimensional finite element thermal-mechanical coupling model was developed to simulate the friction spot joining with a flat shoulder tool for AA6061-T6 Al alloy and carbon fiber reinforced polymer (CFRP) at different welding conditions. When
Externí odkaz:
https://doaj.org/article/37c0aa0eb17042d78d1d06ed7f3412c9
Autor:
Ninshu Ma, Peihao Geng, Yunwu Ma, Katsushi Shimakawa, Jeong-Won Choi, Yasuhiro Aoki, Hidetoshi Fujii
Publikováno v:
Journal of Materials Research and Technology, Vol 17, Iss , Pp 3397- (2022)
Externí odkaz:
https://doaj.org/article/8c6ddc50ea7041debf4eabc19c014364
Autor:
Yunwu Ma, Yang Yu, Peihao Geng, Ryohei Ihara, Kyohei Maeda, Reiichi Suzuki, Tetsuo Suga, Ninshu Ma
Publikováno v:
Materials & Design, Vol 210, Iss , Pp 110075- (2021)
Zinc-coated ultra-high-strength steel (UHSS) sheets are highly susceptible to liquid metal embrittlement (LME) during resistance spot welding. However, systematic understanding on LME cracks in the pullout fracture of UHSS welds is still lacking. Thi
Externí odkaz:
https://doaj.org/article/5236c813cfb446e5bbaffb7e48c1c719
Autor:
Yunwu Ma, Akira Takikawa, Jun Nakanishi, Kazuyoshi Doira, Tetsuo Shimizu, Yongxin Lu, Ninshu Ma
Publikováno v:
Materials & Design, Vol 201, Iss , Pp 109505- (2021)
Safety evaluation of resistance spot welds necessitates the accurate measurement of local constitutive properties. This study employed miniature mechanical tests to investigate the deformation and failure behaviors of nugget, heat affected zone (HAZ)
Externí odkaz:
https://doaj.org/article/fcefd744ab8e4cad84a98fbbb80f678b
Publikováno v:
Materials & Design, Vol 197, Iss , Pp 109250- (2021)
A traditional resistance spot weld process in combination with Multi-Ring Domed welding electrodes was applied to join AA5754-O to low carbon steel. The coach peel performance of welds was compared between the as-welded (unbaked) and post-paint bake
Externí odkaz:
https://doaj.org/article/58350cef61214d20872b1647e1414b68