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钛工业进展:2020,37(6):12-16
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退火温度对Ti-6Al-3Nb-2Zr-1Mo合金组织及力学性能的影响
(1:中国船舶重工集团公司第七二五研究所2:先进钛及钛合金材料技术国家地方联合工程研究中心3:国家新材料生产应用示范平台(先进海工与高技术船舶材料))
Effect of Annealing Temperature on Microstructure and Mechanical Properties of Ti-6Al-3Nb-2Zr-1Mo Alloy
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中文摘要: 研究了退火温度对Ti-6Al-3Nb-2Zr-1Mo合金组织和力学性能的影响。结果表明:随着退火温度升高,初生α相含量降低,2°~15°小角度晶界逐渐减少;退火温度较高时,退火过程中发生了α相→β相→α相的相变,<0001>//横向织构消失。随着退火温度升高,Ti-6Al-3Nb-2Zr-1Mo合金屈服强度逐渐降低,抗拉强度、延伸率先升高后降低。退火温度升高后,片层组织比例升高,裂纹扩展功占冲击吸收功的比例增大,材料韧性提升。
Abstract:The effect of annealing temperature on microstructure and mechanical properties of Ti-6 Al-3 Nb-2 Zr-1 Mo alloy was studied. The results show that with the increase of annealing temperature, the content of primary α phase decreases, and the small angle grain boundary of 2°~15° decreases gradually. In addition, phase transformation α phase→β phase→α phase occurs during annealing at higher annealing temperature, and the <0001>//transverse texture disappears. With the increase of annealing temperature, the yield strength of Ti-6 Al-3 Nb-2 Zr-1 Mo alloy gradually decreases, while the tensile strength and elongation first increase and then decrease. With the increase of annealing temperature, the proportion of lamellar structure increases, the ratio of crack propagation work to impact energy increases, and the toughness of material increases.
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基金项目:国家自然科学基金资助项目(51701189)
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