研究了TC11钛合金在温度800～1050℃,应变速率0.005～5s-1条件下的高温压缩变形行为,基于动态材料模型建立了热加工图,并结合变形微观组织观察确定了该合金在实验条件下的高温变形机制.结果表明:TC11钛合金在两相区低应变速率下(0.005～0.05 s-1)变形时主要发生片状组织的球化,并且球化的效果随变形温度的降低和应变速率的增加而增加.在两相区高应变速率下(0.05～5 s-1)变形时发生热加工的非稳定流动,产生剪切裂纹和剪切带等缺陷.在β相区低应变速率下(0.005～0.05 s-1)变形时发生动态再结晶,高应变速率下(0.05～5 s-1)发生动态回复,并且应变速率大于0.1 s-1时有可能发生不稳定流动现象.在变形温度为900℃左右、应变速率为0.005 s-1时,功率耗散率达到峰值,约为57%.
参考文献
| [1] | 白晓环;冯永琦;王韦琪 et al.[J].钛工业进展,2005,22(05):37. |
| [2] | Prasad Y V R K;Gegel H L;Doraivelu S M et al.[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1984,15(10):1883. |
| [3] | Srinivasan N;Prasad Y V R K .[J].Journal of Materials Processing Technology,1995,51(1-4):171. |
| [4] | Ravichandran N;Prasad Y V R K .[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1991,22:2339. |
| [5] | Murty S V S N;Rao B N;Kashyap B P .[J].Journal of Materials Processing Technology,2005,166(02):268. |
| [6] | Prasad YVRK.;Seshacharyulu T. .Processing maps for hot working of titanium alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1998(1/2):82-88. |
| [7] | Nho-Kwang Park;Jong-Taek Yeom;Young-Sang Na .Characterization of deformation stability in hot forging of conventional Ti-6Al-4V using processing maps[J].Journal of Materials Processing Technology,2002(0):540-545. |
| [8] | Prasad Y V R K .[J].Journal of Materials Engineering and Performance,2003,12(06):638. |
| [9] | Prasad Y V R K .[J].Indian Journal of Technology,1990,28:435. |
| [10] | Ziegler H.Progress in Solid Mechanics[M].New York:wiley Press,1963:93. |
| [11] | 曾卫东,周义刚,周军,俞汉清,张学敏,徐斌.加工图理论研究进展[J].稀有金属材料与工程,2006(05):673-677. |
| [12] | Kobayashi S .Technical Report AFML-TR-70-90[R].Berkeley:University of California,1970. |
| [13] | 曾卫东,周义刚,舒滢,赵永庆,杨锦,张学敏.基于加工图的Ti-40阻燃钛合金热变形机理研究[J].稀有金属材料与工程,2007(01):1-6. |
| [14] | 周军,曾卫东,舒滢,周义刚.应用热加工图研究TC17合金片状组织球化规律[J].稀有金属材料与工程,2006(02):265-269. |
| [15] | Seshachacharyulu T;Medeiros S C;Frazier W G et al.[J].Materials Letters,2001,47(03):133. |
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