1. 毕业设计（论文）的内容和要求

钛合金因其低密度、高比强度、优异的耐蚀性能等特点，在军用及民用领域有着广泛的应用前景。

ti-6al-4v（tc4）钛合金作为首个商业化钛合金，因其具有优异的综合力学性能而被广泛应用于航空航天、海洋舰船、深海装备等领域，是当前使用最为广泛的钛合金材料。

然而,ti-6al-4v 钛合金在常温下变形困难，通过热塑性成形可以解决这一难题，同时还可以改善它的组织和性能然而其居高不下的成本限制了钛合金更加广泛的应用，因而从合金设计和加工工艺优化两个方面降低钛合金成本并得到超高强度合金已成为国内外钛科技工作者的研究热点。

2. 参考文献

[1] Li, L.; Li, M. Constitutive model and optimal processing parameters of TC17 alloy witha transformed microstructure via kinetic analysis and processing maps. Mater.Sci.Eng. A2017, 698, 302#8211;312. [2] Liu, D.; Liu, Y.; Zhao, Y.; Huang, Y.; Chen, M. The hot deformation behavior and microstructure evolution of HA/Mg-3Zn-0.8Zr composites for biomedical application. Mater. Sci. Eng. C 2017, 77, 690#8211;697. [3] M.A. Shafaat,H. Omidvar,B. Fallah, Prediction of hot compression flow curves of Ti-6Al-4V alloy in α β phase region, Materials design, 2011, 32,4689. [4] G.Chen, C.Z.Ren, X.D.Qin, J.Li, Temperature dependent work hardening in Ti-6Al-4V alloy over large temperature and strain rate ranges: Experiments and constitutive mod-eling,Materials design, 2015, 83,598. [5] W.S. Lee, C.F. Lin, Plastic deformation and fracture behaviour of Ti-6Al-4V alloy l-oaded with high strain rate under various temperatures, Materials Science and Engineering: A, 1998, 241, 48. [6] R.S. Mishra, V.V. Stolyarov, C. Echer, R.Z. Valiev, A.K. Mukherjee, Mechanical beh-avior and superplasticity of a severe plastic deformation processed nanocrystalline Ti-6Al-4V alloy, Materials Science and Engineering: A, 2001, 298, 44. [7] E. Alabort, D. Putman, R.C. Reed, Superplasticity in Ti-6Al-4V: Characterisation, m-odelling and applications, Acta Materiallia, 2015, 95, 428. [10]S.Bruschi,S.Poggio, F.Quadrini,M.E. Tata, Workability of Ti-6Al-4V alloy at high Tem-peratures and strain rates, Materials Letters, 2004, 58, 3622. [8]S.V. Zherebtsov, E.A. Kudryavtsev, G.A. Salishchev, B.B. Straumal, S.L. Semiatind, Microstructure evolution and mechanical behavior of ultrafine Ti-6Al-4V during low-temperature superplastic deformation, Acta Materiallia, 2016, 121, 152. [9] S.V. Zherebtsov, E.A. Kudryavtsev, G.A. Salishchev, B.B. Straumal, S.L. Semiatind,Microstructure evolution and mechanical behavior of ultrafine Ti-6Al-4V during low-temp-erature superplastic deformation, Acta Materiallia, 2016, 121, 152. [10] Y.Q. Ning, B.C. Xie, H.Q. Liang, H. Li, X.M. Yang, H.Z. Guo, Dynamic softening behavior of TC18 titanium alloy during hot deformation, Materials Design,2015, 71,68. [11] Y.Q. Ning, X. Luo, H.Q. Liang, H.Z. Guo, J.L Zhang, K. Tan, Competition between dynamic recovery and recrystallization during hot deformation for TC18 titanium alloy, Materials Science and Engineering: A，2015, 635, 77. [12]Devaraj, V.V. Joshi, A. Srivastava, S. Manandhar, V. Moxson, V.A. Duz, C. Lavender,Alow-cost hierarchical nanostructured beta-titanium alloy with high strength, Nature Communications, 2016, 7, 11176. [13]JACKSON M.Microstructural evolution of titanium alloys during subransus forging [D].London:Departmrnt of Materials,Imperial Collrgr London，2002. [14]FAVRE J,FABREGUE D,PIOTD,et al.Modeling grain boundary motion and dynamic re-crystallizationin in pure metals[J].Metallurgical and Materials Trabsactions A,2013,44(13):5861-5875. [15] Ebied S , Hamada A , Borek W , et al. High-temperature deformation behavior and microstructural characterization of high-Mn bearing titanium-based alloy[J]. Materials Characterization, 2018, 139:176-185.

3. 毕业设计（论文）进程安排

起讫日期 设计（论文）各阶段工作内容 备 注 2018.12.26-2019.01.18 查阅中外文资料，翻译外文文献 参加讨论 2019.01.19-2019.03.28 撰写开题报告 参加开题答辩 2019.03.29-2019.04.26 制定研究方案，熟悉仪器 参加讨论 2019.04.27-2019.05.03 前期的实验研究，结果分析 参加讨论 2019.05.04-2019.05.15 撰写中期报告 参加中期检查答辩 2019.05.16-2019.06.10 后期的实验研究，结果分析，补充计算 参加讨论 2019.06.11-2019.06.15 整理数据，撰写论文，准备答辩 参加毕业论文答辩