1. 毕业设计（论文）的内容和要求

1954年美国成功研制出ti6al4v合金，该合金由于其优异的综合性能，如耐热性，强度，塑性，韧性，成形性，焊接性，耐腐蚀性和生物相容性等，被广泛应用在航空航天、海洋工程、民用、生物医疗等领域，时至今日ti6al4v仍是世界上使用最广泛的钛合金，约占钛合金总消费量的75-85％。

许多其他钛合金可视为ti-6al-4v合金改性。

由于ti6al4v主要用于航空航天结构件、推进器中，其疲劳、断裂性能从合金设计的角度至关重要。

2. 参考文献

[1] L#252;tjering G, Williams J C著, 雷霆, 杨晓源译. Titanium[M]. 冶金工业出版社,2003. [2] Cui C, Hu B M, Zhao L, et al. Titanium alloy production technology, market prospects and industry development[J]. Materials Design, 2011, 32(3):1684-1691. [3] Niinomi M. Mechanical properties of biomedical titanium alloys[J]. Materials Science Engineering A, 1998, 243(1#8211;2):231-236. [4] 梁恩泉, 黄森森, 马英杰,等. Fe对Ti-6Al-4VELI合金力学性能的影响[J]. 材料研究学报, 2016, 30(4):299-306. [5] 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. [6] 吴欢, 赵永庆, 葛鹏,等. β稳定元素对钛合金α相强化行为的影响[J]. 稀有金属材料与工程, 2012, 41(5):805-810. [7] 赵永庆, 刘军林, 周廉. 典型β型钛合金元素Cu,Fe和Cr的偏析规律[J]. 稀有金属材料与工程, 2005, 34(4):531-538. [8] T. Kishi, H. Ohyamaand K. Kim: Tetsu-to-Hagane, 72 (1986), 123 [9] T. Horiya, H. G. Suzuki andT. Kishi: Tetsu-io~Hagctn~, 75 (1989),2250. [10] 张尧, 常辉, 李广州, et al. Fe含量对Ti-xFe-B合金铸态组织演变及力学性能的影响[J]. 稀有金属材料与工程, 2017, 46(s1):180-184. [11] Xiaoliang Gaoa, Chaoqun Xiaa, et al. Effects of iron content on the microstructure and corrosion behavior of Ti-30Zr-5Al-3V-xFe alloys. Materials Chemistry and Physics.218(2018)87-97. [12] Horiya T, Kishi T. Relationship between fracture toughness and crack extension resistance curves (R curves) for Ti-6Al-4V alloys[J]. Metallurgical Materials Transactions A, 1998, 29(3):781-789. [13] Shi X, Zeng W, Zhao Q. The effects of lamellar features on the fracture toughness of Ti-17 titanium alloy[J]. Materials Science Engineering A, 2015, 636(636):543-55 [14] Sen I, Tamirisakandala S, Miracle D B, et al. Microstructural effects on the mechanical behavior of B-modified Ti#8211;6Al#8211;4V alloys[J]. Acta Materialia, 2007, 55(15):4983-4993. [15] Sieniawski J, Filip R, Ziaja W. The effect of microstructure on the mechanical properties of two-phase titanium alloys[J]. Journal of Materials Processing Tech, 2003, 133(1):84-89. [16] Hirth J P, Froes F H. Interrelations between fracture toughness and other mechanical properties in titanium alloys[J]. Metallurgical Transactions A, 1977, 8(7):1165-1176. [17] T. Horiya, H. G. Suzuki andT. Kishi: Tetsu-io~Hagctn~, 75 (1989),2250. [18] Jianwei X, Weidong Z, Dadi Z, et al. Influence of alpha/beta processing on fracture toughness for a two-phase titanium alloy[J]. Materials Science and Engineering: A, 2018, 731:85-92.

3. 毕业设计（论文）进程安排

2018.12.25~2019.1.10 查阅中外文资料，翻译外文资料，参加讨论。

2019.1.10~2019.1.20 撰写开题报告，参加开题答辩。

2019.3.1~2019.3.8 制定研究方案，熟悉仪器，参加讨论。