冷轧及退火对LA141镁锂合金组织及性能的影响
发布时间：2018-10-09 11:24
【摘要】：对热挤压LA141镁锂合金进行了冷轧和退火处理,研究了不同冷轧变形量及退火工艺对轧板显微组织及力学性能的影响。结果表明,热挤压态的LA141镁锂合金可进行大变形量的冷轧,最大变形量可达95%。随着变形量的增加,加工硬化程度增加以及晶粒细化使合金的抗拉强度升高,抗拉强度最高达到253.4 MPa,而伸长率由于晶粒细化作用程度不同而呈现先降低后升高再降低的趋势。退火后,合金发生回复和再结晶,其抗拉强度下降,在250℃×1h工艺下,合金发生完全再结晶,晶粒细小,具有较高的强度和伸长率。
[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，
本文编号：2259168
[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，
本文编号：2259168
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