利用Hopkinson压杆装置,对Ti-5Mo-5V-2Cr-3Al(TB10)合金进行高速冲击试验,采用光学显微镜和透射电镜分析其冲击相变与动态承载能力之间的关系.结果表明,显微组织状态对绝热剪切敏感性影响很大,在相同的应变率条件下,两相区固溶+时效、两相区固溶+双重时效的TB10合金试样中均可观察到明显的绝热剪切带,且沿剪切带出现裂纹,而固溶态试样晶粒的变形是均匀的,没有观察到绝热剪切带,其相对于前两者是绝热剪切不敏感的组织状态;在高应变率下,固溶态的试样发生了应力诱发马氏体相变;β晶粒内的条状析出物是由β相和斜方马氏体相混合构成;由于相变过程吸收了一部分冲击功,使试样未能达到材料本构失稳形成ASB的临界条件,且应力诱发马氏体相具有较高的均匀伸长率及较大的塑性,使试样仍具有较好的动态承载能力.
参考文献
| [1] | Bai Yilong .Adiabatic shear banding[J].Res Mechanica,1990,31:133. |
| [2] | Teng X;Wierzbiclti T;Couque H .On the transition from adia-batic shear banding to fracture[J].Mechanics of Materials,2007,39:107. |
| [3] | Murr L E;Ramirez A C;Gaytan S M;Lopez M I Martinez E Y Hernandez D H Martinez E .Microstrneture evolution associat-ed with adiabatic shear bands and shear band failure in ballistic plug formation in Ti-6Al-4V targets[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2009,516:205. |
| [4] | Woei-Shyer Lee;Chen-Yang Liu;Tao-Hsing Chen .Adiabatic shearing behavior of different steels under extreme high shear loading[J].Journal of Nuclear Meteriale,2008,374:313. |
| [5] | Su-Tang Chiou;Hsien-Lung Tsai;Woei-Shyan Lee .Effects of Strain Rate and Temperature on the Deformation and Fracture Behaviour of Titanium Alloy[J].Materials transactions,2007(9):2525-2533. |
| [6] | 张静,谭成文,刘新芹,王富耻,才鸿年.Ti-6Al-4V合金绝热剪切带的演化[J].稀有金属,2009(05):648-651. |
| [7] | 宋鸿武,程明,张士宏,门菲,王忠堂.具有马氏体组织的TC11合金两相区变形的组织机制及工艺优化[J].稀有金属,2008(06):698-704. |
| [8] | 杨扬,程信林.绝热剪切的研究现状及发展趋势[J].中国有色金属学报,2002(03):401-408. |
| [9] | 孙坤,程兴旺,王富耻,苗普,赵双赞.组织及应变率对TC6钛合金绝热剪切敏感性的影响[J].稀有金属材料与工程,2008(10):1856-1860. |
| [10] | Martirrez F;Murr L E;Ramirez A;Lopez M I Gaytan S M .Dynamic deformation and adiabatic shear microswctures eesociat-ed with ballistic plug formation and fracturo in Ti-6Al-4V targets[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2007,434(455):581. |
| [11] | Liu Wei;Zhang Zhu;Hui Songxiao .Study on mar-contain properties of TB10 alloy[J].Rare Metal Materials and Engineering,2005,34:383. |
| [12] | Andrade U;Meyere M A .Dynamic recrystallization in high-strain,high-etnrin-rate plastic deformation of copper[J].Acta Materialia,1994,42(08):3183. |
| [13] | Wittman C L;Meyers M A;Pak H R .Observation of an adiabat-ic shear band in AISI 4340 etcel by high-voltage transmission e-lectron microscopy[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1990,21 A(03):707. |
| [14] | Meyers M A;Pak H R .Observation of an adiabatic shear band in titanium by high-voltage transmission electron microscopy[J].Acta Metallurgica,1986,34(12):2493. |
| [15] | 鲍利索娃E A;陈石卿.钛合金金相学[M].北京:国防工业出版社,1986 |
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