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- 저자 : Peng Da Huo (검색결과 2 건)
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Lei Gao,Feng Li,Ye Wang,Xing Mao Xiao,Peng Da Huo 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.8
Solid-state bonding of heterogeneous materials is one of the effective ways to achieve light weight. An extrusion formingprocess for Mg/Al thickness-oriented bonding sheet was carried out. Due to triaxial compressive stress in the extrusion container,the AZ31 and AA6061 billets were deformed and the bonding and forming of Mg/Al thickness-oriented sheet can berealized by this method. The observation results of the bonding position by using XRD, SEM and EDS showed that: at theforming temperature with 360–420 °C, it had a good bonding interface, and the width of the transition layer increased withthe increase of the forming temperature. The presence of brittle intermetallic compounds in the transition layer indicated thatmetallurgical bonding had occurred at the interface. Considering all factors comprehensively, when the forming temperaturewas 390 °C, the bonding quality was appropriate. Its tensile-shear strength was 42 MPa, the width of the interface transitionlayer was about 10 μm, and the microhardness was about 164.3 HV. This method provided scientific guidance and technicalreserves for green forming of Mg/Al sheets.
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Rong He Gao,Feng Li,Wen Tao Niu,Peng Da Huo 대한금속·재료학회 2023 METALS AND MATERIALS International Vol.29 No.7
The long manufacturing process, difficult coordinated regulation of structural properties and interface bonding ability aresome of the difficulties that restrict the rapid development of lightweight composite plate forming and manufacturing for along time. In order to solve the above problems, this paper proposes adding hard plate to roll Al/Mg/Al composite plates. The thickness of Mg/Al is 10:1, and the hard-plate rolling process experiments were carried out by designing five groupsof different temperatures. The influence of magnesium plate microstructure evolution on the interface bonding ability andmechanical behavior of composite plates is mainly studied. Under the same conditions, the matrix microstructure changesgreatly from 200 to 350 °C. At 350 °C, the microstructure of Mg plate in ND is uniform without shear bands and twins. Itsrecrystallization ratio is 31.77%, which played a role in weakening the texture and reducing its anisotropy. Interestingly,in the process of three-point bending, the non-basal plane slip and the basal plane slip start simultaneously, the maximumbending strength of the composite plate reaches 504 MPa, and the interface was well bonded without obvious bending fatiguephenomenon. The tear test showed that the tear load reaches 0.42 kN, and the elastic elongation stage of Al is longer than thetear propagation stage, and the interface bonding was uniform. The hard plate rolling process provides scientific guidancefor the forming and preparation of composite plates.
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