金属学报  1994, Vol. 30 Issue (22): 465-470

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Ti_3Al基合金超塑形变的微观观察

孙福生;马济民;曹春晓

北京航空材料研究所

MICROSCOPIC OBSERVATION OF SUPERPLASTIC DEFORMATION IN A Ti_3AI ALLOY

SUN Fusheng;MA Jimin;CAO Chunxiao(Institute of Aeronautical Materials; Beijing)

孙福生;马济民;曹春晓. Ti_3Al基合金超塑形变的微观观察[J]. 金属学报, 1994, 30(22): 465-470.
, , . MICROSCOPIC OBSERVATION OF SUPERPLASTIC DEFORMATION IN A Ti_3AI ALLOY[J]. Acta Metall Sin, 1994, 30(22): 465-470.

摘要 参考文献 相关文章 Metrics 全文: PDF(464 KB)   摘要: Ｔｉ－２５Ａｌ－１０Ｎｂ－３Ｖ－１Ｍｏ（ａｔ．－％）合金在９００－９８０℃温度范围和１×１０~（－３）Ｓ~（－１）拉伸速率下显示了良好的超塑性能，δ＝３８２％．其超塑形变受控于晶界滑动（主要为α_２／α_２晶界滑动），并协调以扩散、位错、位错环和层错机制．扩散协调机制表现为螺旋位错和割阶的攀移，位错协调制主要为的位错的滑移．位错环主要为的切变型位错环，并伴有少量的扩散切变型位错环． 关键词 ： Ｔｉ_３Ａｌ基合金,  超塑形变,  微观观察     Abstract：Superior superplasticity up to 382 % is noticeable when alloy Ti-25AI-10Nb-3V-1 Mo(at.-%)is deformed at temperature 900-980℃ and a strain rate of 1×10~(-3) s~(-1). The superplastic model for grain boundary sliding combined with diffusion,dislocation slip, dislocation loop and stacking fault accommodation processes is recognized.Diffusion accommodation process is characteristic of helical dislocation and superjog climb by atomic diffusion mechanism. It is well established that type dislocation with dominate the dislocation accommodation process. The majority of dislocation loops are identified as shearing ones with,and a few of them are determined to be shearing plus diffusion dislocation loops with . Key words： Ti_3AI alloy    superplastic deformation    microscopic observation      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 孙福生 马济民 曹春晓 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1994/V30/I22/465 1AricliA,VastarvaRB．In:AgrawalSPeds,SuperplasticForming,ASH,1985:702HamiltonCH．In:AgrawalSPeds．SPeds．SuperplasticForming,ASH,1985:133HamiltonCH,In:MasaruKobayashi,FunihiroWakaieds．,Superplasticity,MRS,1989:594HammondC．In:PatonNE,Hamiltoneds．,SuperplasticFormingofStructuralAlloys,AIME,1982:1315BlackburnMJ,RuckleDJ,BevanCE．TechnicalReportAFML-TR-78-18,AirForeeMaterialsLa-boratory,Dayton,OH,19786BlackburnMJ,SmithMP,TechnicalReportAFWAL-TR-81-4086,AirForceWrightAeronauticalLaboratories,Dayton,OH,19827LarsenJM,WilliamsKA,BalsoneSJ,StuckeMA．In:WhangSH,LiuCT,PopeD,StieglerJOeds．,High-TemperatureAluminidesandInermetallics,Warrendate,PA;TMS,1990:5218AbhijitDutta、DipankarBanerjee．ScrMetall,1990;24:13199LipisttHA,ConfonAdvancedHighTemperauteAlloy,USA,1985:137j [1] 张勇;张少卿;陶春虎. 氢化Ti-25Al-10Nb-3V-1Mo铸态合金的热压缩行为及其显微组织[J]. 金属学报, 1996, 32(3): 235-240. [2] 艾素华;关少轩;冯泽民;葛景岩. Ti_3Al基合金的拉伸形变和断裂[J]. 金属学报, 1995, 31(6): 286-288. [3] 廖波;王天生;杨柯;苑辉;肖福仁;李依依. 加氢热化学处理对Super-α2合金组织的影响[J]. 金属学报, 1995, 31(5): 223-228. [4] 卢斌;李东;崔玉友. Ti_3Al基合金中α_2/α_2+β相界的计算与测定[J]. 金属学报, 1995, 31(21): 413-417. [5] 徐瑞;徐达鸣;李庆春;崔玉友;李东;胡壮麒. 快速凝固Ti_3Al基合金的显微组织[J]. 金属学报, 1994, 30(12): 545-550. [6] 孙福生;高文;曹春晓. 形变温度对Ti_3Al基合金α_2相滑移系的影响[J]. 金属学报, 1994, 30(11): 507-514. [7] 张丙;万晓景;王建国;张莹. Ti—24Al—11Nb—3V—1Mo合金热稳定性研究[J]. 金属学报, 1993, 29(10): 23-27. Viewed Full text Abstract Cited   Shared      Discussed