郭彦霖,罗 群,王国旗,刘 斌,陈 玮,李 谦.双时效对Ti-4Al-5Mo-6Cr-5V-1Nb合金显微组织和力学性能的影响[J].稀有金属材料与工程,2020,49(4):1395~1401.[Guo Yanlin,Luo Qun,Wang Guoqi,Liu bin,Chen Wei,Li Qian.Effect of Duplex Aging on Microstructure and Mechanical Property of Ti-4Al-5Mo-6Cr-5V-1Nb alloy[J].Rare Metal Materials and Engineering,2020,49(4):1395~1401.]
双时效对Ti-4Al-5Mo-6Cr-5V-1Nb合金显微组织和力学性能的影响
投稿时间:2019-01-08  修订日期:2019-05-09
中文关键词:  Ti-4Al-5Mo-6Cr-5V-1Nb合金  双时效  力学性能  显微组织
基金项目:航空科学基金资助(项目号2017ZF25022)
中文摘要:
      研究了固溶、固溶后单时效以及固溶后双时效处理对Ti-4Al-5Mo-6Cr-5V-1Nb合金组织和力学性能的影响。结果表明,820 ℃下固溶0.5 h后,合金中的α相完全溶解;单/双时效合金的硬度均随时效时间增加先升高后降低;合金经300 ℃/8 h+500 ℃/8 h双时效处理后可达到458 HV的峰值硬度,1462 MPa抗拉强度以及3.4%延伸率,其强度比原始合金高6%,也高于单时效合金。界面能计算结果表明ω相使α相形核的阻力降低50%,促进了α相的析出并细化α板条,从而提升合金的硬度,强度及塑性。
Effect of Duplex Aging on Microstructure and Mechanical Property of Ti-4Al-5Mo-6Cr-5V-1Nb alloy
英文关键词:Ti-4Al-5Mo-6Cr-5V-1Nb  duplex aging  microstructure  mechanical property
英文摘要:
      Effects of solution treatment, single aging treatment, and duplex aging treatment on the microstructure and mechanical property of Ti-4Al-5Mo-6Cr-5V-1Nb alloy are studied. After the solution treatment at 820 ℃ for 0.5 h, α phase completely dissolved. The hardness of single/ duplex aging treated alloys both increase at the beginning and then decrease. The alloy duplex aging treated at 300 ℃ for 8 h and 500 ℃ for 8 h processes the peak-aging hardness of 458 HV, ultimate tensile strength (UTS) of 1462 MPa and elongation of 3.4%, whose UTS is 6% higher than original alloy and even higher than single aging treated alloy. The calculation of interface energy indicates that ω phase can promote the precipitation of α phase and the refinement of α lath by decreasing the nucleation resistance of α phase by 50%, thus increasing the hardness, strength, and elongation of alloys.
作者单位E-mail
郭彦霖 上海大学 材料基因组工程研究院 guoyanlin711@126.com 
罗 群 上海大学 材料科学与工程学院 省部共建高品质特殊钢冶金与制备国家重点实验室  
王国旗 上海大学 材料科学与工程学院  
刘 斌 上海大学 材料科学与工程学院  
陈 玮 中国航空制造技术研究院 材料应用研究部  
李 谦 上海大学 材料基因组工程研究院 shuliqian@shu.edu.cn 
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