【摘要】：對熱擠壓LA141鎂鋰合金進(jìn)行了冷軋和退火處理,研究了不同冷軋變形量及退火工藝對軋板顯微組織及力學(xué)性能的影響。結(jié)果表明,熱擠壓態(tài)的LA141鎂鋰合金可進(jìn)行大變形量的冷軋,最大變形量可達(dá)95%。隨著變形量的增加,加工硬化程度增加以及晶粒細(xì)化使合金的抗拉強(qiáng)度升高,抗拉強(qiáng)度最高達(dá)到253.4 MPa,而伸長率由于晶粒細(xì)化作用程度不同而呈現(xiàn)先降低后升高再降低的趨勢。退火后,合金發(fā)生回復(fù)和再結(jié)晶,其抗拉強(qiáng)度下降,在250℃×1h工藝下,合金發(fā)生完全再結(jié)晶,晶粒細(xì)小,具有較高的強(qiáng)度和伸長率。
[Abstract]:The hot extruded LA141 magnesium-lithium alloy was cold-rolled and annealed. The effects of different cold rolling deformation and annealing process on the microstructure and mechanical properties of the rolled plate were studied. The results show that the hot extruded LA141 magnesium-lithium alloy can be cold-rolled with a large amount of deformation and the maximum deformation is up to 95%. With the increase of deformation amount, the degree of work hardening and grain refinement increase the tensile strength of the alloy. The tensile strength reaches the highest of 253.4 MPa, and the elongation decreases first and then decreases because of the different degree of grain refinement. After annealing, recovery and recrystallization occurred, and the tensile strength decreased. At 250 鈩，

本文編號：2259168