在THERMECMASTOR-Z型热模拟试验机上对原始等轴组织的TC11钛合金进行热压缩实验,采用基于Murty准则的加工图技术研究该合金在990-1080℃、0.001-70 s-1变形参数范围内的微观变形机制和流变失稳现象,并优化该合金的高温变形参数.结果表明, α+β两相区的较佳变形参数为990-1008℃、0.001-0.02 s-1,以990℃、0.001 s-1附近为最佳,其变形机制为超塑性.在β单相区,中等变形程度(ε<0.6)下的较佳参数为1030-1080℃、0.001-0.1 s-1,以1060-1080℃、0.001 s-1附近为最佳,其变形机制为动态再结晶;而大变形程度(ε>0.6)下的较佳参数为1020-1060℃、0.004-0.6 s-1,以1040-1050℃、0.016-0.07 s-1附近为最佳,其变形机制也是动态再结晶.失稳区出现在β单相区内,其参数范围为1000-1080℃、4.0-70 s-1,在该失稳区会出现β晶粒的不均匀变形;应变速率在0.001 s-1附近时,在β单相区变形会出现β晶粒的动态粗化.
参考文献
| [1] | Zeng W D,Zhou Y G.Acta Metall Sin,2002; 38:1273 (曾卫东,周义刚.金属学报,2002;38:1273) |
| [2] | Prasad Y V R K,Gegel H L,Doraivelu S M,Malas J C,Morgan J T,Lark K A,Barker D R.Metall Trans,1984;15A:1883 |
| [3] | Prasad Y V R K,Sasidhara S.Hot Working Guide:A Compendium of Processing Maps.Materials Park,OH:ASM international,The Materials Information Society,1997:1 |
| [4] | Prasad Y V R K,Seshacharyulu T.Int Mater Rev,1998;43:243 |
| [5] | Murty S V S N,Rao B N,Kashyap B P.Int Mater Rev,2000; 45:15 |
| [6] | Bao R Q,Huang X,Cao C X,Ke J.Mater Rev,2004;18(7):26 (鲍如强,黄旭,曹春晓,柯俊.材料导报,2004;18(7):26) |
| [7] | Spigarelli S,Cerri E,Cavaliere P,Evangelista E.Mater Sci Eng,2002; A327:144 |
| [8] | Zeng W D,Zhou Y G,Zhou J,Yu H Q,Zhang X M,Xu B.Rare Met Mater Eng,2006; 35:673 (曾卫东,周义刚,周军,俞汉清,张学敏,徐斌.稀有金属材料与工程,2006;35:673) |
| [9] | Murty S V S N,Rao B N.Mater Sci Eng,1998; A254:76 |
| [10] | Ziegler H.In:Sneddon I N,Hill Reds.,Progress in Solid Mechanics,Amsterdam:North-Holland Publishing,1965:91 |
| [11] | Murty S V S N,Rao B N,Kashyap B P.Compos Sci Technol,2003; 63:119 |
| [12] | Robi P S,Dixit U S.J Mater Process Technol,2003; 142:289 |
| [13] | Seshacharyulu T,Medeiros S C,Frazier W G,Prasad Y V R K.Mater Sci Eng,2000; A284:184 |
| [14] | Long M,Rack H J.Mater Sei Eng,1995; A194:99 |
| [15] | Seshacharyulu T,Medeiros S C,Morgan J T,Malas J C,Frazier W G,Prasad Y V R K.Mater Sci Eng,2000;A279:289 |
| [16] | Nieh T G,Wadsworth J.Int Mater Rev,1999; 44:59 |
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