对Ti-6Al-4V钛合金电子束焊接试样进行高温气体渗氢,研究了置氢对显微组织形态的影响,并对微量氢对Ti-6Al-4V疲劳寿命的影响进行考察.显微组织研究结果表明:置氢浓度低于0.120 wt%时,氢以固溶态存在于合金中,并未形成氢化物;位错在次生的α、β相区聚集,α/β相界往往是裂纹萌生的根源.疲劳实验结果表明:随置氢浓度的增加,疲劳寿命大幅下降;这是由于微量氢的存在降低了Ti-6Al-4V的韧性,并加速疲劳裂纹的扩展,从而降低了疲劳寿命.
参考文献
| [1] | Tal-Gutelmacher E;Eliezer D;Eylon D .The effects of low fugacity hydrogen in duplex-and beta-annealed Ti-6Al-4V alloy[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2004,A381(1-2):230-236. |
| [2] | A.Taha;P.Sofronis .A micromechanics approach to the study of hydrogen transport and embrittlement[J].Engineering Fracture Mechanics,2001(6):803-837. |
| [3] | H. Liu;Cao;P. He;J. C. Feng .Effect Of Hydrogen On Diffusion Bonding Of Commercially Pure Titanium And Hydrogenated Ti6al4v Alloys[J].International journal of hydrogen energy,2009(2):1108-1113. |
| [4] | Luo L S;Su Y Q;Guo J J et al.Formation of titanium hydride in Ti-6Al-4V alloy[J].Journal of Alloys and Compounds,2006,425(1-2):140-144. |
| [5] | D.B. Shan;Y.Y. Zong;Y. Lv .The effect of hydrogen on the strengthening and softening of Ti-6Al-4V alloy[J].Scripta materialia,2008(6):449-452. |
| [6] | Zhu T K;Li M Q .Effect of 0.770wt% H addition on the microstructure of Ti-6Al-4V alloy and mechanism of δ hydride formation[J].Journal of Alloys and Compounds,2009,481(1 -2):480-485. |
| [7] | Boyer R R;Spurr W F .Characteristics of sustained-load cracking and hydrogen effects in Ti-6Al-4V[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1978,9(01):23-29. |
| [8] | Moody N R;Gerberich W W .Effect of stress state on internal hydrogen-induced crack growth in Ti-6Al-6V-2Sn[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1982,13(06):1055-1061. |
| [9] | Shih D S;Robertson I M;Birnbaum H K .Hydrogen embrittlement of alpha titanium:in situ TEM studies[J].Acta Metallurgica,1998,36(01):111-124. |
| [10] | 李晓华,侯红亮,李志强.置氢Ti6Al4V合金的微观组织演变规律[J].材料科学与工艺,2009(03):385-388. |
| [11] | 何晓,沈保罗,岳俊,曹建玲,邱绍宇,邹红.氢对Ti-2Al-2.5Zr钛合金疲劳性能的影响[J].金属热处理,2002(12):10-13. |
| [12] | 李晓华,孙中刚,侯红亮,王耀奇,李志强.置氢Ti-6Al-4V合金组织与室温变形行为的相关性[J].北京科技大学学报,2008(08):888-892. |
| [13] | 郭隆,白秉哲,侯红亮.置氢Ti-6Al-4V钛合金超塑性研究[J].稀有金属,2009(04):467-471. |
| [14] | Thompson N;Wadsworth N J;Louat N .The origin of fatigue fracture in copper[J].Philosophical Magazine,1956,1(02):113-126. |
| [15] | Senkov O N;Jonas J J .Effect of phase composition and hydrogen level on the deformation behavior of titanium-hydrogen alloys[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1995,27(07):1869-1876. |
| [16] | O.N.SENKOV;J.J. JONAS .Dynamic Strain Aging and Hydrogen-Induced Softening in Alpha Titanium[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,1996(7):1877-1887. |
| [17] | P. Castany;F. Pettinari-Sturmel;J. Crestou .Experimental study of dislocation mobility in a Ti-6Al-4V alloy[J].Acta materialia,2007(18):6284-6291. |
| [18] | Williams D P;Nelson H G .Gaseous hydrogen-induced cracking of Ti-5Al-2.5Sn[J].Metallurgical and Materials Transactions,1972,3(08):2107-2113. |
| [19] | P. S. Pao;C. R. Feng;S. J. Gill .Hydrogen-assisted fatigue crack growth in beta-annealed Ti-6Al-4V[J].Scripta materialia,1998(1):19-26. |
| [20] | 何晓 .含氢的新型钛合金的疲劳行为研究[D].四川大学,2003. |
| [21] | 唐志平,彭楚峰,何晓,沈保罗.氢对Ti-2Al-2.5Zr钛合金疲劳裂纹扩展速率的影响[J].核动力工程,2003(06):555-558. |
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%