3Mg2相含量極低，且無(wú)彌散分布的Al3Mg2相。隨著退火溫度的升高，細(xì)長(zhǎng)晶粒的寬度增加，位錯(cuò)密度減小。在75~150 ℃退火后，相比于軋制態(tài)合金，其屈服強(qiáng)度降低8%~33%，極限抗拉伸強(qiáng)度降低1%~12%，延伸率增加16%~83%。此外，分析了各種強(qiáng)化機(jī)制對(duì)屈服強(qiáng)度的貢獻(xiàn)，以及原有位錯(cuò)和Mg溶質(zhì)對(duì)塑性的貢獻(xiàn)。;The Al-10wt% Mg alloy was cold-rolled with the thickness reduction ratio of 75% followed by annealing at 75~150 °C, and its microstructure characteristics and mechanical behavior were investigated. The as-rolled and annealed Al-10wt% Mg alloys are characterized by elongated ultra-fine grains, high density of dislocations, a very small amount of Al3Mg2 phase, and no dispersed distribution of Al3Mg2 phase. With increasing the annealing temperature, the width of elongated ultra-fine grains is increased and the dislocation density is decreased. After annealing at 75~150 °C, compared with those of as-rolled alloys, the yield strength of annealed alloys is decreased by 8%~33%, the ultimate tensile strength is decreased by 1%~12%, and the elongation is increased by 16%~83%. The contributions of various strengthening mechanisms to yield strength and the contributions of preexisting dislocations and Mg solute to ductility were analyzed and discussed."/>