Enhancing Tensile Properties of Wire-Arc Additively Manufactured Ti-6Al-4 V Deposits Via Cryogenic Vaporised Ar Shielding/Cooling

Peng Han; Jia Lin; Wen Wang; Zhihao Liu; Yating Xiang; Ting Zhang; Qiang Liu; Xiaohu Guan; Ke Qiao; Yingchun Xie; Kuaishe Wang

doi:10.1007/s12540-022-01248-y

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자료유형: 학술저널

저자정보: Peng Han (Xi’an University of Architecture and Technology) Jia Lin (Xi’an University of Architecture and Technology) Wen Wang (Xi’an University of Architecture and Technology) Zhihao Liu (Xi’an University of Architecture and Technology) Yating Xiang (Xi’an University of Architecture and Technology) Ting Zhang (Xi’an University of Architecture and Technology) Qiang Liu (Xi’an University of Architecture and Technology) Xiaohu Guan (Xi’an University of Architecture and Technology) Ke Qiao (Xi’an University of Architecture and Technology) Yingchun Xie (Guangdong Academy of Sciences) Kuaishe Wang (Xi’an University of Architecture and Technology)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.29 No.3

발행연도: 2023.3

수록면: 845 - 860 (16page)

DOI: 10.1007/s12540-022-01248-y

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The high-entropy alloy particles reinforced 6061Al composite was prepared by cold spray (CS) and then modified by frictionstir processing (FSP). The microstructure evolutions, corrosion, and wear behaviors of the composites were investigated.Results showed that numerous micro-pores and cracks were distributed in the Al matrix due to adiabatic shear instability andinsufficient deformation of the deposited particles for CSed samples. The average size of uniformly distributed HEA particleswas ~ 24 μm, and the geometric necessary dislocation (GND) density reached 17.1 × 1015m−2 due to large plastic deformationduring CS. Comparatively, the micro-pores and cracks were eliminated, and many fragmented HEA particles dispersed inthe Al matrix with an average size of ~ 4 μm for FSPed sample. Note that the GND density reduced to 9.8 × 1015m−2 due todynamic recrystallization during FSP. The formation rate of the oxide film was gradually greater than that of the dissolutionrate with the samples immersion in 3.5 wt% NaCl solution from 12 to 36 h, and the main corrosion mechanism was particledissolution around micro-pores and pitting for CSed and FSPed samples, respectively. In the polarization process, the FSPedsamples exhibited low corrosion tendency and high corrosion rate due to the dense and uniform microstructure, low GNDdensity, and dispersed HEA particles. The FSPed samples had better wear resistance than the CSed samples at 25 °C and200 °C. The dominant wear mechanisms of CSed and FSPed samples were abrasion at 25 °C, while the wear mechanismsof these samples were adhesion accompanied by abrasion at 200 °C.

#Cold spray · Friction stir processing · CoCrFeNip/6061Al composite · Corrosion behavior · Wear property

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