本文選題：等溫鍛造 + 時效工藝��； 參考：《航空材料學報》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)、等溫鍛造和時效處理后Mg-10Gd-2Y-0.5Zn-0.3Zr合金的微觀組織進行分析研究。結果表明:等溫鍛造合金晶粒相對于原始鍛態(tài)合金細化不明顯,但大量的第二相在基體中的彌散析出是等溫鍛造合金強度略有上升的主要原因;合金在200℃時效過程中,隨著時效時間的延長,越來越多細小顆粒及層片狀強化相在基體中析出,其最優(yōu)的時效工藝為200℃/60h;峰值時效合金的抗拉強度、屈服強度和伸長率分別為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效合金的主要強化機制。
[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