1. 毕业设计(论文)的内容和要求
TiAl基合金因其密度低,比强度高,高温性能好,被广泛应用于航空航天领域。
然而TiAl基合金因室温塑性差严重影响了其应用。
本课题拟通过对TiAl基合金的拉伸二次微裂纹的研究去解析合金相组织以及合金化元素对TiAl基合金断裂韧性的影响。
2. 参考文献
根据毕业要求指点10.2,毕设期间要进行研究现状调查与总结,要求在开题报告及毕业设计(论文)中涉及的英文文献不少于15篇,其中近5年不少于5篇,英文文献不少于8篇。
以下是与本课题相关的部分文献列表[1]陈子勇, 吴丽娟, 周峰, et al. TiAl基合金室温塑性的影响因素及改善方法[J]. 材料导报, 2014, 28(9):11-14.[2]杨亮, 辛景景, 张有为, et al. Cr和Mn元素掺杂对高Nb-TiAl合金组织转变及拉伸性能的影响[J]. 稀有金属材料与工程, 2017(10):257-262.[3]Ha T K , Jung J Y . High Temperature Deformation Behavior of a Ti-45.5Al-2Cr-4Nb-0.4B Intermetallic Compound[J]. Materials Science Forum, 2004, 449-452:829-832.[4]Bewlay B P , Nag S , Suzuki A , et al. TiAl alloys in commercial aircraft engines[J]. High Temperature Technology, 2016, 33(4-5):549-559.[5]Wu Z , Hu R , Zhang T , et al. Microstructure determined fracture behavior of a high Nb containing TiAl alloy[J]. Materials Science and Engineering: A, 2016, 666:297-304.[6]Bin Z , Xiangyi X , Hongchao K , et al. Effect of microstructure on the fracture toughness of multi-phase high Nb-containing TiAl alloys[J]. Intermetallics, 2018, 100:142-150.[7]Zhu Bin, Xue Xiangyi, Kou Hongchao,等. The cavitation of high Nb-containing TiAl alloys during tensile tests around BDTT[J]. Materials Science Engineering A, 729:86-93.[8]高克玮, 王燕斌, 褚武扬, et al. INITIATION AND SLOW STABLE GROWTH OF CLEAVAGE-LIKE CRACK IN TiAl[J]. 1992, 37(17):1487-1487.[9]CAO Hui, RUI ZhiYuan, CHEN WenKe,等. Crack propagation mechanism of γ-TiAl alloy with pre-existing twin boundary[J]. Science China(Technological Sciences), 2019(9).[10]Mota Solis,N, Hu,D, Loretto,M.H,等. The Influence of Microstructure and Residual Stress on Pre-Yield Cracking in TiAl-Based Alloys[J]. Materials Science Forum, 426-432:1655-1660.
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