【摘要】：采用光學(xué)顯微鏡、掃描電鏡、X射線衍射儀、顯微硬度計和萬能力學(xué)試驗機等研究了Mg-11Gd-2Y-5Sm-0.5Zr合金在不同熱處理工藝下顯微組織和力學(xué)性能的變化規(guī)律。結(jié)果表明:合金的最佳固溶時效熱處理工藝為525℃×8 h+225℃×12 h;Mg-11Gd-2Y-5Sm-0.5Zr合金鑄態(tài)組織主要由α-Mg基體和沿晶界網(wǎng)狀分布的Mg_5Gd,Mg_(41)Sm_5相組成,經(jīng)固溶時效熱處理后析出相主要為均勻分布于晶內(nèi)和晶界的點狀或粒狀的Mg_5Gd,Mg_(24)Y_5以及Mg_(41)Sm_5相;經(jīng)該工藝處理后,合金在室溫下的硬度和抗拉強度分別為145.6HV和261.4 MPa;固溶時效態(tài)合金的主要強化機制為固溶強化和析出相彌散強化。
[Abstract]:The microstructure and mechanical properties of Mg-11Gd-2Y-5Sm-0.5Zr alloy were studied by means of optical microscope, scanning electron microscope, X-ray diffractometer, microhardness tester and universal mechanical tester. The results show that the optimum solution aging treatment process is 525 鈩，

本文編號：2124310