采用Birdgman定向凝固系统,在恒定的温度梯度和宽的生长速度范围(v=10-120 μm/s),对Ti-46Al-2Cr-2Nb合金进行了定向凝固实验,并对合金的领先相类型、一次枝晶间距(λ1)、二次枝晶间距(λ2)和片层间距(λe)进行分析.结果表明,随着生长速度的增加,试样的领先相由β相转变为α相;通过计算领先相界面温度,发现基于最高界面温度判据的相选择模型能对Ti-46Al-2Cr-2Nb合金领先相随生长速度v的转变趋势进行预测;λ1随v的变化规律受领先相转变影响不大,满足λ1 =700.6v-0.24关系;但λ2随v的变化规律受领先相转变影响较大,当领先相为β和α时,分别满足λ2=44.0v-0.10和λ2=57.3v-0.23关系;λe与v之间满足λe=16.4v-0.76关系,不受领先相转变的影响.与TiAl二元合金相比,提高生长速度更有利于Ti-46Al-2Cr-2Nb合金片层细化.
参考文献
[1] | Yamaguchi M,Johnson D R,Lee H N,Inui H.Intermetallics,2000; 8:511 |
[2] | Kim S E,Lee Y T,Oh M H,Inui H,Yamaguchi M.Intermetallics,2000; 8:399 |
[3] | Zollinger J,Lapin J,Daloz D,Combeau H.Intermetallics,2007; 15:1343 |
[4] | Chen G L,Lin J P.Physical Metallugry for Ordered Intermetallics.Beijing:Metallurgical Industry Press,1999:183(陈国良,林均品.有序金属间化合物结构材料物理金属学基础.北京:冶金工业出版社,1999:183) |
[5] | Johnson D R.Acta Mater,1997; 45:2523 |
[6] | Johnson D R,Inui H,Muto S,Omiya Y,Yamanaka T.Acta Mater,2006; 54:1077 |
[7] | Xiao Z X.PhD Dissertation,Beihang University,2011(肖志霞.北京航空航天大学博士学位论文,2011) |
[8] | Xiao Z X,Zheng L J,Yang L L,Yan J,Zhang H.Acta Metall Sin,2010; 10:1223(肖志霞,郑立静,杨莉莉,闫洁,张虎.金属学报,2010; 10:1223) |
[9] | Fan JL,LiXZ,SuYQ,ChenRR,Guo J J,FuH Z.J Cryst Growth,2011; 337:52 |
[10] | Fan J L,Li X Z,Su Y Q,Chen R R,Guo J J,Fu H Z.Appl Phys,2011; 105A:239 |
[11] | LiXZ,SunT,YuCX,SuYQ,CaoYZ,GuoJJ,Fu H Z.Acta Metall Sin,2009; 45:1479(李新中,孙涛,于彩霞,苏彦庆,曹勇智,郭景杰,傅恒志.金属学报,2009; 45:1479) |
[12] | Thomas M,Bacos M T.High Temp Mater,2011; 3:7 |
[13] | Nie G.PhD Dissertation,Harbin Institute of Technology,2012(聂革.哈尔滨工业大学博士学位论文,2012) |
[14] | Kim M C,Oh M H,Lee J H,Inui H,Yamaguchi M,Wee D M.Mater Sci Eng,1997; A239 240:570 |
[15] | Su Y Q,Liu C,Li X Z,Guo J J,Li B S,Jia J,Fu H Z.Intermetallics,2005; 13:267 |
[16] | Hunt J D.In:Argent B Bed.,International Conference on Solidification and Casting of Metals.London:The Metals Society,1979:3 |
[17] | Kurz W,Fisher D J.Acta Mater,1981; 29:11 |
[18] | Trivedi R.Metall Mater Trans,1984; 15A:977 |
[19] | Fan J L,Li X Z,Su Y Q,Chen R R,Guo J J,Fu H Z.Mater Chem Phys,2011; 130:1232 |
[20] | Fan J L.PhD Dissertation,Harbin Institute of Technology,2012(樊江磊.哈尔滨工业大学博士学位论文,2012) |
[21] | Fan J L,Li X Z,Su Y Q,Guo J J,Fu H Z.Mater Des,2012; 34:552 |
[22] | Liu C.PhD Dissertation,Harbin Institute of Technology,2007(刘畅.哈尔滨工业大学博士学位论文,2007) |
[23] | Zheng Y B,Li S M,Li Z X,Zhu P C,Fu H Z.J Aeronaut Mater,2009; 29:12(郑元斌,李双明,李臻熙,朱鹏超,傅恒志.航空材料学报,2009;29:12 |
[24] | Muto S,Yamanaka T,Lee H N,Johnson D R,Inui H,Yamaguchi M.Adv Eng Mater,2001; 3:391 |
[25] | Johnson D R,Inui H,Yamaguchi M.Intermetallics,1998;6:647 |
[26] | Spinelli J E,Rosa D M,Ferreira I L,Garcia A.Mater Sci Eng,2004; A383:271 |
[27] | Appel F,Paul J D H,Oehring M.Gamma Titanium Aluminide Alloys:Science and Technology.Weinheim:Wiley,2011:33 |
[28] | Trivedi R,Kurz W.Solidification Processing of Eutectic Alloys.Pennsylvania:Metallurgical Society,1988:3 |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%