Acta Metall Sin  1994, Vol. 30 Issue (17): 223-228    DOI:

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SUPERPLASTIC DEFORMATION OF Ti-12Co-5Al ALLOY

LIU Qing; YANG Wangyue; CHEN Guoliang (University of Science and Technology Beijing); WU Yiqin (Northwest Institute of Nonferrous Metal Research; Xi'an)

LIU Qing; YANG Wangyue; CHEN Guoliang (University of Science and Technology Beijing); WU Yiqin (Northwest Institute of Nonferrous Metal Research; Xi'an). SUPERPLASTIC DEFORMATION OF Ti-12Co-5Al ALLOY. Acta Metall Sin, 1994, 30(17): 223-228.

Abstract References Related Articles Recommended Metrics Download:  PDF(454KB)  Export:  BibTeX | EndNote (RIS)       Abstract  An Ti-12Co-SAl alloy sheet with an ultra fine α-Ti/Ti2Co microstructure was prepared by proper smelting and thermomechanical treatment. An excellent superplastic elongation more than 2000% was obtained at high strain rate of3 ×10-2 s-1 and under relatively low temperature of 700℃. Microstructural study indicates that the supepolastic defomration promotes the grain growth and shape change of the Ti2Co intermetallic particles.No cavity was found in the specimen after even superplastically deformed to 1550%. The combination of strain hardening, resulted from the coarsening of α－Ti grains and Ti2Co particles, together with the strain rate hardening is considered to be the main reason why the alloy exhibits excellent superplasticity. Key words:  Ti-Co-Al alloy      superplastic deformation      plastic stability      second phase growth      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1994/V30/I17/223 1GhoshAK,HamiltonCH．MetallTrans,1979;10A:6992PatonNE,HamiltonCH．MetallTrans,1979;10A:2413WertJA,PatonNE．MetallTrans,1983;14A:25354LeaderJR,NealDF,HammondC．MetallTrans,1986;17A:935FrommeyerG,CzarnowskiPV．ZMetallk,1990;81:7566LIUQing,YangWangyue,ChenGuoliang．ActaMetallMater,tobepublished7刘庆,黄晓旭,姚枚,杨金凤,金属学报,1991;27:B4148LiuQing,YangJinfeng,YaoMei．ScrMetallMater,199l;25:109 [1] LIU Yi;LI Dingqiang; LIN Dongliang(Shanghai Jiaotong University;Shanghai 200030) (Manuscript received 1995-06-28;in revised form 1995-10-12). DISLOCATION FEATURES IN FeAl ALLOY AFTER SUPERPLASTIC DEFORMATION[J]. 金属学报, 1996, 32(3): 225-230. [2] SUN Fusheng;MA Jimin;CAO Chunxiao(Institute of Aeronautical Materials; Beijing). MICROSCOPIC OBSERVATION OF SUPERPLASTIC DEFORMATION IN A Ti_3AI ALLOY[J]. 金属学报, 1994, 30(22): 465-470. [3] LIU Qing;LIU Zhengang;YAO Mei University of Science and Technology Beijing Harbin Institute of Technology. CAVITATION AND RESIDUAL STRENGTH OF AS-WARM ROLLED Al-Li-Cu-Mg-Zr ALLOY AFTER SUPERPLASTIC DEFORMATION[J]. 金属学报, 1993, 29(9): 25-30. [4] JIANG Xinggang;CUI Jianzhoug;MA Longxiang Northeast University of Technology; Shenyang Box 317; Northeast University of Technology; Shenyang 110006. FRACTAL DIMENSION OF CAVITIES SHAPE CHANGES DURING SUPERPLASTIC DEFORMATION OF HIGH STRENGTH Al ALLOY 7475[J]. 金属学报, 1990, 26(4): 144-147. [5] CUI Jianzhong;MA Longxiang Northeast University of Technology; ShenyangDepartment of Metals Forming;Northeast University of Technology; Shenyang. GRAIN SHAPE EFFECT IN SUPERPLASTIC DEFORMATION[J]. 金属学报, 1988, 24(4): 354-361. [6] CUI Jianzhong;MA Longxiang Northeast University of Technology; ShenyangCUI Jianzhong Lecturer;P.O.Box 317;Northpast Uninersity of Technology;Shenyang. CHARACTERISTIC PARAMETERS IN SUPERPLASTIC DEFORMATION[J]. 金属学报, 1988, 24(1): 92-96. No Suggested Reading articles found! Viewed Full text Abstract Cited   Shared      Discussed