通过SEM原位拉伸研究了全片层Ti-46.5Al-2.0Cr-1.5Nb-1.0V合金的显微组织与断裂行为的关系.通过热处理手段获得可区分晶粒尺度和片层厚度的全片层组织.研究表明,随着晶粒尺度的增大,裂纹扩展路径由平直变得曲折,断裂方式由沿片层界面和沿晶断裂变为穿片层断裂.随着片层厚度的减小,韧带的刚性增强,塑性变形减小,增韧效果得到改善.在全片层组织中,微裂纹在α2/γ片层界面形核.
参考文献
| [1] | Kim Y W .Intermetallic Alloys Based on Gamma Titanium Aluminide[J].Journal of The Minerals,Metals & Materials Society,1989,41:24. |
| [2] | 仲增墉;张继 .[J].稀有金属材料与工程,2001,30(ZK):93-98. |
| [3] | 闫蕴琪;周廉;罗国珍 .[J].稀有金属材料与工程,2001,30(ZK):212-217. |
| [4] | Kim Y W;Dimiduk D M .Progress in the Understanding of Gamma Titanium Aluminides[J].Journal of The Minerals,Metals & Materials Society,1991,43:40. |
| [5] | Kim Y W .Ordered Intermetallic Alloys, Part Ⅲ: Gamma Titanium Aluminides[J].Journal of The Minerals,Metals & Materials Society,1994,46:30. |
| [6] | Kim Y W .Microstructure Evolution and Mechanical Properties of a Forged Gamma Titannium Aluminide Alloy[J].Acta Metallurgica Et Materialia,1992,40:1121. |
| [7] | 李臻熙,曹春晓.室温变形γ-TiAl基合金中形变孪晶与α2片的交截机制[J].稀有金属材料与工程,2003(02):95-98. |
| [8] | 唐建成,贺跃辉,刘文胜,周科朝,张俊红,鲁世强,黄伯云.全层状TiAl合金室温拉伸性能的影响因素[J].稀有金属材料与工程,2003(03):209-212. |
| [9] | Chan K S;Kim Y W .Influence of Microstructure on Crack-Tip Micromechanics and Fracture Behaviors of a Two-Phase TiAl Alloy[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1992,23A:1663. |
| [10] | Kim YW. .EFFECTS OF MICROSTRUCTURE ON THE DEFORMATION AND FRACTURE OF GAMMA-TIAL ALLOYS[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1995(0):519-533. |
| [11] | Chan K S .Toughening Mechanisms in Titanium Aluminides[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1993,24A:569. |
| [12] | Chan K S .Evidence of Shear Ligament Toughening in TiAl-Based Alloys[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1995,26A:1407. |
| [13] | Chan K S;Kim Y W .Effects of Lamellae Spacing and Colony Size on the Fracture Resistance of a Fully-Lamellar TiAl Alloy[J].Acta Metallurgica Et Materialia,1995,43:439. |
| [14] | L Heatherly et al.A Study of the Fracture Behavior of PST TiAl Alloys[J].Materials Science and Engineering A,1997,A239/240:404. |
| [15] | Chan K;Onstott S J;Kumar K S .The Fracture Resistance of a Binary TiAl Alloy[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,2000,31A:71. |
| [16] | Lu Yonghao,Zhang Yonggang,Chen Changqi.IN-SITU OBSERVATION OF CRACK PROPAGATION IN PST CRYSTALS OF Ti-49% Al ALLOY[J].中国有色金属学会会刊（英文版）,1999(01):63-69. |
| [17] | LU Yong-hao,ZHANG Yong-gang,QIAO Li-jie,WANG Yan-bin.In-situ crack propagation observation in fully lamellar Ti-49%Al alloy[J].中国有色金属学会会刊,2000(05):599. |
| [18] | Kyosuke K;Inui H;Yamaguchi M .Deformation of Lamellar Structure in TiAl-Ti3Al Two-Phase Alloys[J].Philosophical Magazine A:Physics of Condensed Matter:Structure,Defects and Mechanical Properties,1998,78:1. |
| [19] | 陆永浩,张永刚,乔利杰,王燕斌,陈昌麒,褚武扬.α2板条在TiAl合金全层状组织形变和断裂中的作用[J].中国有色金属学报,2001(01):1-5. |
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%