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研究了热处理对高强Zr47Ti45Al5V3(质量分数,%)合金微观组织和力学性能的影响.结果表明,该合金初始加工态由α(hcp)和β(bcc)2相组成,板条状的α相均匀分布在β相基体上.合金虽然具有很高的强度,但塑性很小,其抗拉强度为1648MPa,而其延伸率只有0.8%.DSC结果表明,合金在560~750℃之间有α→β的相转变.对热处理后样品的力学性能检测结果表明,合金中β相含量的增多,使其塑性提高,但强度有所降低;通过在α→β相变点上不同温度的退火处理,调控α与β相的相对含量可以获得强度和塑性的良好配合.当合金中β相的体积分数为60%左右时,合金具有较佳综合力学性能,其抗拉强度为1398 MPa,延伸率达到3.1%.

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