Quantitative relationship between impact property and dynamic compressive performance of Ti alloy
-
摘要: 为认识钛合金的冲击性能与冷镦成品率的关系,运用组织定量统计分析的方法研究了Ti-3Al-5Mo-4.5V钛合金显微组织参数对冲击性能的影响规律,结合动态压缩后的剪切带宽度变化规律,探讨了裂纹形成功、裂纹扩展功以及冲击功与剪切带宽度之间的关系.结果表明:随着退火温度的上升,α片长宽比先增加后减小,裂纹形成功也是先上升后下降,而裂纹扩展功却是先减小后增加,冲击总功持续上升;冲击功指标与材料的动态压缩性能未发现必然联系,裂纹形成功与动态压缩后的剪切带宽度成反比例关系,而裂纹扩展功与剪切带宽度线性正相关.Abstract: To explore the relationship between impact property and cold upsetting finished product ratio of Ti alloy,the effect of microstructure parameter on impact property of Ti-3Al-5Mo-4.5V alloy was investigated systemically with quantitative statistical analysis method. The relationship among crack initiation energy, crack propagation energy, total impact energy and the width of shear band was analyzed combined with the variety of the width of shear band after dynamic compressive deformation. The result shows as follows. First, as anneal temperature rises, α platelet ratio(length/width) increases first and then decreases, crack initiation energy ascends first and then descends, while crack propagation energy diminishes first and then increases, and total impact energy ascends persistently. Second, there is no certain relationship between total impact energy and dynamic compressive performance; crack initiation energy is in inverse proportion to the width of shear band, while there is a positive correlation between the crack propagation energy and the width of shear band linearly.
-
Key words:
- Ti alloy /
- statistical /
- microstructure /
- impact property /
- shear band
-
[1] 刘风雷.我国航空钛合金紧固件的发展[J]. 航空制造技术,2000(6):39-41 Liu Fenglei. Development of aeronautical titanium alloy fastener in China [J]. Aeronautical Manufacturing Technology, 2000(6):39-41(in Chinese) [2] Popov N N, Ivanov A G, Morozov S A. Effect of the deformation rate on resistance of the titanium alloy VT16 to plastic deformation[J]. Problemy Prochnosti,1986(8):45-48 [3] Moiseev V N. High-strength titanium alloy VT16 for cold-worked fastener part production [J]. Metallovedenie i Termicheskaya Obrabotka Metallov, 2001(2):28-32 [4] 史巨元. 钢的动态力学性能及应用[M]. 北京:冶金工业出版社,1993:9-11 Shi Juyuan. Dynamical mechanical properties and apply of steel[M].Beijing:Metallurgy Industry Press, 1993:9-11(in Chinese) [5] Li G A, Zhen L, Lin C, et al. Deformation localization and recrystallization in TC4 alloy under impact condition[J].Materials Science and Engineering,2005(A395):98-101 [6] Sekkal A C, Langlade C, Vannes A B. Tribologically transformed structure of titanium alloy(Ti6Al4V) in surface fatigue induced by repeated impact[J]. Materials Science and Engineering,2005(A393):140-146 [7] Mohandas T, Banerjee D, Kutumba V V Rao,et al. Microstructure and mechanical properties of friction welds of an α＋β titanium alloy[J]. Materials Science and Engineering,2000(A289):70-82 [8] 宋昊. BT16钛合金显微组织与动态压缩变形行为间的关系研究. 北京:北京航空航天大学材料科学与工程学院,2006 Song Hao. Effects of microstructure variations on dynamic compressive deformation behavior of BT16 titanium alloy. Beijing:School of Materials Science and Engineering,Beijing University of Aeronautics and Astronautics,2006(in Chinese) [9] 秦国友. 定量金相[M]. 四川:四川科学技术出版社,1987:216-217 Qin Guoyou. Quantitative metallography[M]. Sichuan:Sichuan Science and Technology Press, 1987:216-217(in Chinese) [10] 肖纪美.金属的韧性与韧化[M].上海:科学技术出版社,1980:81 Xiao Jimei. Toughness and temper of metal [M]. Shanghai:Shanghai Science and Technology Press, 1980:81(in Chinese) [11] 梁益龙,雷泯. 35SiMnMoV钢多相复合组织的冲击性能[J].钢铁,1994,29(1):37-41 Liang Yilong,Lei Min. The impact property of multiphase complex structure in 35SiMnMoV steel[J]. Iron and Steel,1994,29(1):37-41(in Chinese) -
点击查看大图
计量
- 文章访问数: 3255
- HTML全文浏览量: 233
- PDF下载量: 1178
- 被引次数: 0
下载:
