退火温度对LA103Z镁锂合金冷轧板材组织和力学性能的影响
Effect of Annealing Temperature on Microstructure and Mechanical Properties of Cold Rolling Sheet for LA103Z Magnesium Lithium Alloy
马骏 1王瑞 1樊晓泽 1齐二帅1
作者信息
- 1. 西安四方超轻材料有限公司,陕西西安 710089
- 折叠
摘要
采用真空感应熔炼、退火、锻造和冷轧工艺制备了 1 mm厚的LA103Z镁锂合金冷轧板材,通过金相组织和室温拉伸分析研究了不同退火工艺下板材的微观组织与力学性能.结果表明:LA103Z镁锂合金冷轧板材为α-Mg+β-Li双相组织,基体为β相,α相呈纤维状沿轧制方向分布.随退火温度的增加,在冷轧板材内部储能和外界动能的相互作用下,不稳定的组织会发生再结晶,α相形态由纤维状逐步转变为短条状、细小的块状,200℃退火后α相转变为细小点状分布,随后随温度升高有长大趋势.LA103Z镁锂合金冷轧板材的抗拉强度和屈服强度随着退火温度的升高而逐渐降低,延伸率随着退火温度的升高而增加.
Abstract
The cold rolling sheet for LA103Z magnesium lithium alloy with thickness of 1 mm was prepared by vacuum induction melting,annealing,forging and cold rolling,and the microstructure and mechanical properties of different annealing processes were stud-ied by metallographic analysis and room temperature tensile analysis.The results show that the structure of LA103Z consists of α-Mg phase as strengthening phase and β-Li phase as matrix structure.The α phase is distributed fiber-like along the rolling direction.The unstable microstructure of alloy will recrystallize under the interaction of internal energy storage and external kinetic energy when the annealing temperature increased.As a result,the morphology of α phase gradually changed from fibrous to short strip and fine mass.After annealing at 200 ℃,α phase changes to fine spot distribution,and then grows with the increase of annealing temperature.The ten-sile strength and yield strength will decrease gradually when the annealing temperature increased,but the elongation will increase.
关键词
LA103Z镁锂合金/冷轧/退火/显微组织/力学性能Key words
LA103Z magnesium-lithium alloy/cold rolled/annealed/microstructure/mechanical property引用本文复制引用
出版年
2024
NETL
NSTL
万方数据