首页|Room and cryogenic deformation behavior of AZ61 and AZ61-xCaO(x=0.5％,1.0％)alloy
Room and cryogenic deformation behavior of AZ61 and AZ61-xCaO(x=0.5％,1.0％)alloy
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This study investigates the influence of CaO(0.5％,1.0％,mass fraction)alloying on the microstructural evolution,texture development and deformation behavior of AZ61 magnesium alloy.The uniaxial tension tests at room(RT)and cryogenic(CT,-150 ℃)temperature were per-formed to investigate the twinability and dislocation behavior and its consequent effect on flow stress,ductility and strain hardening rate.The re-sults showed that the AZ61-1CaO exhibited superior strength/ductility synergy at RT with a yield strength(YS)of 223 MPa and a ductility of 23％as compared to AZ61(178 MPa,18.5％)and AZ61-0.5CaO(198 MPa,21％).Similar trend was witnessed for all the samples during CT deformation,where increase in the YS and decrease in ductility were observed.The Mtex tools based in-grain misorientation axis(IGMA)anal-ysis of RT deformed samples revealed the higher activities of prismatic<a>slip in AZ61-CaO,which led to superior ductility.Moreover,subse-quent EBSD analysis of CT deformed samples showed the increased fraction of fine {10-12} tension twins and nucleation of multiple {10-12}twin variants caused by higher local stress concentration at the grain boundaries,which imposed the strengthening by twin-twin interaction.Last-ly,the detailed investigations on strengthening contributors showed that the dislocation strengthening has the highest contribution towards strength in all samples.
Umer Masood Chaudry、Hafiz Muhammad Rehan Tariq、Nooruddin Ansari、Soo Yeol Lee、Tea-Sung Jun
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Department of Mechanical Engineering,Incheon National University,Incheon 22012,Republic of Korea
Research Institute for Engineering and Technology,Incheon National University,Incheon 22012,Republic of Korea
Department of Materials Science & Engineering,Chungnam National University,Daejeon 34134,Republic of Korea
National Research Foundation of Korea(NRF)grants funded by the Korean government(MSIT)National Research Foundation of Korea(NRF)grants funded by the Korean government(MSIT)Incheon National University Research Grant in 2022
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