在强流脉冲电子束表面改性实验的基础上,通过数值计算方法对β-Cez钛合金的温度场和应力场进行模拟.模拟结果表明:以能量密度为3 J/cm2的单次脉冲处理,样品的最大熔化深度为1.0 μm;试样表层(0～2.4 μm)为压应力,最大值约2.60 GPa,次表层(2.4 ～12 μm)有大于100MPa的拉应力,在深度3.2 μm处存在最大值,约为500 MPa.实验截面EBSD结果显示,强流脉冲电子束处理β-Cez钛合金有约12μm深的马氏体层.由马氏体相变诱发应力与温度的关系得到马氏体相变最大的触发应力值为2.40 GPa,与准静态最大压应力值2.60 GPa相当,说明马氏体相变源于准静态热应力引发的冲击热应力.由马氏体相变触发应力和深度的分布关系给出应力在β-Cez钛合金中的衰减系数为173 mm-1.
参考文献
| [1] | Ping D H;Yamabe-Mitarai Y;Cui C Y et al.Stress-induced α" martensitic (110) twinning in β-Ti alloys[J].Applied Physics Letters,2008,93(15):151911. |
| [2] | Bhaskaran T A .Rapid solidification of titanium-alloys-a review[J].International Journal of Rapid Solidification,1992,7(02):127-149. |
| [3] | 宋振飞,秦颖,郝胜智,董闯,吴平生,张向东.强流脉冲电子束表层改性过程的三维温度场数值模拟[J].核技术,2008(06):455-459. |
| [4] | Schiller S;Heisig U;Panzer S.Electron Beam Technology[M].New York,John Wiley&Sons,1982 |
| [5] | 严宗达;王洪礼.热应力[M].北京:高等教育出版社,1993 |
| [6] | D. I. Proskurovsky;V. P. Rotshtein;G. E. Ozur;Yu. F. Ivanov;A. B. Markov .Physical foundations for surface treatment of materials with low energy, high current electron beams[J].Surface & Coatings Technology,2000(1/3):49-56. |
| [7] | Duerig T W;Albrecht J;Richter D et al.Formation and reversion of stress-induced martensite in Ti-10V-2Fe-3Al[J].ACTA METALLURGICA,1982,30(12):2161-2172. |
| [8] | 张向东 .强流脉冲电子束钛基和镍基合金表面改性[D].大连:大连理工大学,2010. |
| [9] | T.Grosdidier;Y.Combres .Effect of Microstructure Variations on the Formation of Deformation-Induced Martensite and Associated Tensile Properties in a #beta# Metastable Ti Alloy[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2000(4):1095-1106. |
| [10] | Grosdidier T;Philippe M J .Deformation induced martensite and superelasticity in a beta-metastable titanium alloy[J].Materials Science and Engineering A,2000,291(1-2):218-223. |
| [11] | Grosdidier T;Roubaud C;Philippe M J et al.The deformation mechanisms in the beta-metastable beta-Cez titanium alloy[J].Scripta Materialia,1997,36(01):21-28. |
| [12] | Ying Qin;Jianxin Zou;Chuang Dong;Xiaogang Wang;Aimin Wu;Yue Liu;Shengzhi Hao;Qingfeng Guan .Temperature-stress fields and related phenomena induced by a high current pulsed electron beam[J].Nuclear Instruments and Methods in Physics Research, Section B. Beam Interactions with Materials and Atoms,2004(4):544-554. |
| [13] | 邹建新,秦颖,高波,张可敏,郝胜智,王晓钢,董闯.纯镁在强流脉冲电子束轰击下的表面熔化和汽化行为[J].材料热处理学报,2005(05):36-41. |
| [14] | Ying Qin;Chuang Dong;Xiaogang Wang;Shengzhi Hao;Aimin Wu;Jianxin Zou;Yue Liu .Temperature profile and crater formation induced in high-current pulsed electron beam processing[J].Journal of Vacuum Science & Technology, A. Vacuum, Surfaces, and Films,2003(6):1934-1938. |
| [15] | Ying Qin;Zhenfei Song;Chuang Dong .Thermodynamic Processes and Phenomena Induced by High Current Pulsed Electron Beam[J].Materials Science Forum,2007(Pt.3):2439-2442. |
| [16] | 秦颖,王晓钢,董闯,郝胜智,刘悦,邹建新,吴爱民,关庆丰.强流脉冲电子束诱发温度场及表面熔坑的形成[J].物理学报,2003(12):3043-3048. |
| [17] | 秦颖,吴爱民,邹建新,刘悦,王晓钢,董闯.强流脉冲电子束轰击产生表面熔坑的数值模拟研究[J].材料热处理学报,2003(01):85-89. |
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%