1. 毕业设计（论文）的内容和要求

钛及钛合金具有高比强度、低弹性模量、强耐腐蚀性、低膨胀系数、低热导率以及环境友好等优势，现已被广泛用于航空航天、生物医疗以及海洋船舶等领域。

ti-6al-4v合金凭借其良好的综合力学性能，目前仍是世界范围内使用最为广泛的钛合金材料（约占钛材消费量的50%）。

但ti-6al-4v合金同时也具有诸多缺点，合金室温抗拉强度相对较低，难以胜任高强度构件的需求；同时合金高温塑性变形加工时所受流变抗力较大，热加工性能较差。

2. 参考文献

1.Peng X, Guo H, Wang T, et al. Effects of β treatments on microstructures and mechanical properties of TC4-DT titanium alloy[J]. Materials Science Engineering A, 2012, 533:55-63. 2.Ren G G, Je Y T, Zhan Y Z, et al. Effect of microstructure on deformation behavior of Ti#8211;6Al#8211;4V alloy during compressing process[J]. Materials Design, 2012, 36:796-803. 3.Seshacharyulu T, Medeiros S C, Frazier W G, et al. Microstructural mechanisms during hot working of commercial grade Ti#8211;6Al#8211;4V with lamellar starting structure[J]. Materials Science Engineering A, 2002, 325(1-2):112-125. 4.He L, Dehghan-Manshadi A, Dippenaar R J. The evolution of microstructure of Ti#8211;6Al#8211;4V alloy during concurrent hot deformation and phase transformation[J]. Materials Science Engineering A, 2012, 549(7):163-167. 5.Liu C M, Wang H M, Tian X J, et al. Development of a pre-heat treatment for obtaining discontinuous grain boundary α in laser melting deposited Ti-5Al-5Mo-5V-1Cr-1Fe alloy[J]. Materials Science Engineering A, 2014, 604(604):176-182. 6.Luo J, Ye P, Li M Q, et al. Effect of the alpha grain size on the deformation behavior during isothermal compression of Ti#8211;6Al#8211;4V alloy[J]. Materials Design, 2015, 88:32#8211;40. 7.Wang K, Li M Q. Effects of heat treatment and hot deformation on the secondary α phase evolution of TC8 titanium alloy[J]. Materials Science Engineering A, 2014, 613:209-216. 8.Luo J, Li M, Li H, et al. Effect of the strain on the deformation behavior of isothermally compressed Ti#8211;6Al#8211;4V alloy[J]. Materials Science Engineering A, 2009, 505(1-2):88-95. 9.Zhang S, Li J, Kou H, et al. Effects of thermal history on the microstructure evolution of Ti-6Al-4V during solidification[J]. Journal of Materials Processing Technology, 2015, 227. 10.Vrancken B, Thijs L, Kruth J P, et al. Heat treatment of Ti6Al4V produced by Selective Laser Melting: Microstructure and Mechanical properties[J]. Journal of Alloys Compounds, 2012, 541(22):177-185. 11.Yu W, Li M Q, Luo J. Effect of deformation parameters on the precipitation mechanism of secondary α phase under high temperature isothermal compression of Ti#8211;6Al#8211;4V alloy[J]. Materials Science Engineering A, 2010, 527(16):4210-4217. 12.Peng X, Guo H, Shi Z, et al. Study on the hot deformation behavior of TC4-DT alloy with equiaxed α β starting structure based on processing map[J]. Materials Science Engineering A, 2014, 605:80#8211;88. 13.Xu J, Zeng W, Sun X, et al. Microstructure evolution during isothermal forging and subsequent heat treatment of Ti-17 alloy with a lamellar colony structure[J]. Journal of Alloys Compounds, 2015, 637:449-455. 14.Ji Z, Yang H, Li H. Evolution of Two Types of α Plates in Tri-modal Microstru-cture of TA15 Alloy under Varying Processing Conditions[J]. Rare Metal Materials Engineering, 2015, 44(3):527-531. 15.樊亚军, 曹继敏, 杨华斌,等. Fe含量对Ti-6Al-4V钛合金力学性能的影响[J]. 金属热处理, 2013, 38(3):21-23. 16.刘金豪, 刘建生, 熊运森,等. TC4-DT钛合金的热变形行为研究及加工图[J]. 稀有金属材料与工程, 2013, 42(8):138-142. 17.雷文光, 韩栋, 张永强,等. TC4-DT钛合金热变形机制及加工图[J]. 钛工业进展, 2015(1):20-25.

3. 毕业设计（论文）进程安排

2016.12.21~2017.1.14 查阅中外文资料，翻译外文资料 参加讨论 2017.2.13~2017.3.1 撰写开题报告 参加开题答辩 2017.3.2~2017.3.17 制定研究方案，熟悉仪器 参加讨论 2017.3.17~2017.4.18 前期的实验研究，结果分析 参加讨论 2017.4.19~2017.4.30 撰写中期报告 参加中期检查答辩 2017.5.1~2017.5.20 后期的实验研究，结果分析，补充计算 参加讨论 2017.5.21~2017.6.13 整理数据，撰写论文，准备答辩 参加毕业论文答辩