摘要
研究了热处理对Mg-0.8Zn-0.15Y-0.6Zr合金微观组织、力学性能及阻尼性能的影响。结果表明:合金铸态及热处理态的微观组织均由α-Mg和(Mg3YZn6)相组成,(Mg3YZn6)相在热处理过程中表现出良好的热稳定性;热处理温度为400℃时,组织中有富Zr的α-Mg新相析出。与铸态相比,合金热处理后的抗拉强度最大提高了15.2%,伸长率最大提高了10.4%。随着热处理温度的升高,合金应变振幅无关阻尼性能逐渐降低。
Effect of heat treatment on microstructure,mechanical and damping properties of Mg-0.8Zn-0.15Y-0.6Zr alloy was investigated.Experimental results show that the microstructure of as-cast and heat-treated alloy all consists of α-Mg and I-phase（Mg3YZn6）,and I-phase is thermally stable during the process of heat treatment.A new Zr-rich α-Mg phase is formed when the heat treatment temperature is 400 ℃.Compared with the as-cast alloy,the tensile strength and the elongation of heat-treated alloy present a maximum increase of 15.2% and 10.4%,respectively.The damping capacity independent of strain amplitude gradually decreases with the increase of the heat treatment temperature.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2010年第7期94-98,共5页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(50671083)
陕西省自然科学基金(2007E101)
