通过在钛合金中引入临时元素氢,可以改变钛合金的相组成,进而改变钛合金的力学性能和加工性能.利用OP、XRD和TEM研究了固态置氢后Ti6Al4V合金的微观组织变化.研究表明:随氢含量的增加,合金中的β相含量增加,在置氢0.302%及0.490%(质量分数)的试样中发现面心立方(fcc)的氢化物δ,及大量的斜方结构的马氏体α",未发现亚稳态的氢化物γ.提出了一种基于扩散的由βH共析转变生成α及fcc结构的片状氢化物δ的机制,并指出氢的引入可能诱发马氏体转变.
参考文献
| [1] | NAKAHIGASHIJ;YOSHIMURA H.Ultra-fine grain refinement and tensile properties of titanium alloys obtained through protium treatment[J].Journal of Alloys and Compounds,2002:330-332:384-388. |
| [2] | D. Eliezer;N. Eliaz;O. N. Senkov;F. H. Froes .Positive effects of hydrogen in metals[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2000(1):220-224. |
| [3] | ZhangSQ;ZHAO L R .Effectofhydrogenonthesuper-plasticityandmicrostructureofTi-6Al-4Valloy[J].Journal of Alloys and Compounds,1995,218:233-236. |
| [4] | M. NIINOMI;B. GONG;T. KOBAYASHI .Fracture Characteristics of Ti-6Al-4V and Ti-5Al-2.5Fe with Refined Microstructure Using Hydrogen[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,1995(5):1141-1151. |
| [5] | SHIHDS;BIRNBAUM H K .Evidence of fcc titanium hydride formation in β titanium alloy: an X-Ray diffraction study[J].Scripta Metallurgica et Materialia,1986,20:1261-1264. |
| [6] | QAZIJI;SENKOV ON;RAHIM J et al.Phase transformation in Ti - 6Al - 4V - xH alloys[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,2001,32:2453-2463. |
| [7] | XIAOHZ .Studyonthemechanismofhydrideformationinα-Tialloys[J].Scripta Metallurgica et Materialia,1992,27:571-576. |
| [8] | GuJ;HARDIE D .Effect of hydrogen on structure and slow strain rate embrittlement of mill annealed Ti6Al4V[J].Materials Science and Technology,1996,12:802-807. |
| [9] | 康强;张彩碚;赖祖涵 .Ti-H合金共析转变产物的形态与结构[J].金属学报,1995,31(06):241-247. |
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%