本文選題：等溫鍛造 + 時(shí)效工藝　； 參考：《航空材料學(xué)報(bào)》2015年06期

【摘要】：利用金相顯微鏡、掃描電子顯微鏡和透射電子顯微鏡對原始鍛態(tài)、等溫鍛造和時(shí)效處理后Mg-10Gd-2Y-0.5Zn-0.3Zr合金的微觀組織進(jìn)行分析研究。結(jié)果表明:等溫鍛造合金晶粒相對于原始鍛態(tài)合金細(xì)化不明顯,但大量的第二相在基體中的彌散析出是等溫鍛造合金強(qiáng)度略有上升的主要原因;合金在200℃時(shí)效過程中,隨著時(shí)效時(shí)間的延長,越來越多細(xì)小顆粒及層片狀強(qiáng)化相在基體中析出,其最優(yōu)的時(shí)效工藝為200℃/60h;峰值時(shí)效合金的抗拉強(qiáng)度、屈服強(qiáng)度和伸長率分別為379 MPa、245 MPa和4.6%;β'相和長周期相(long period stacking order,LPSO)的大量彌散地在基體中析出是峰值時(shí)效合金的主要強(qiáng)化機(jī)制。
[Abstract]:The microstructure of Mg-10Gd-2Y-0.5Zn-0.3Zr alloy after original forging, isothermal forging and aging treatment was studied by metallographic microscope, scanning electron microscope and transmission electron microscope. The results show that the grain size of the isothermal forging alloy is less than that of the original forging alloy, but the main reason for the slight increase of the strength of the isothermal forging alloy is the dispersion precipitation of a large number of the second phases in the matrix, and the strength of the isothermal forging alloy increases slightly during aging at 200 鈩，

本文編號：2015094