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以计算机材料Mg-Al-Zn合金为研究对象,对添加不同含量Ti元素的该合金热处理后的微观组织和力学性能进行分析,结果表明:Mg-Al-Zn合金微观组织主要由基体α-Mg相、网状β-(Mg17Al12)相,短小的针状相及微小共晶组织颗粒相组成,其中β-(Mg17Al12)相为主要的强化相,其形态和数理决定了合金的强度和硬度。随Ti元素含量增加,合金微观组织逐渐细化、均匀,晶粒数目越多,β相形态分布及尺寸、大小都发生了变化,合金的力学性能逐渐提高;在不同温度下,流变应力-应变曲线呈现走势基本相同的趋势,应力-应变曲线表现为明显的动态再结晶特性,随温度升高,该合金的峰值应力逐渐减小。
The microstructure and mechanical properties of Mg-Al-Zn alloy with different contents of Ti were studied by heat treatment. The results show that the microstructure of Mg-Al-Zn alloy mainly consists of α-Mg Phase, mesophase β- (Mg17Al12) phase, short needle-like phase and micro-eutectic microstructure. The β-Mg17Al12 phase is the main strengthening phase. The morphology and mathematical properties determine the strength and hardness of the alloy. With the increase of Ti content, the microstructure of the alloy is refined and uniform, the number of grains is more, the distribution and size and size of β phase change, and the mechanical properties of the alloy gradually increase. Under different temperatures, the flow stress- The strain curves show the same trends, and the stress-strain curves show obvious dynamic recrystallization characteristics. With increasing temperature, the peak stress of the alloy gradually decreases.