将尖切口强度理论用于ZTi6A14V铸造钛合金损伤容限性能的评价,探讨了不同退火温度对其三点弯曲断裂韧度KQ的影响.结果表明:尖切口试样测定的断裂韧度KQ1不等同于标准试验方法测定的KQ,但可用于铸造钛合金不同工艺间断裂韧度的比较.退火温度的改变可微调ZTi6Al4V铸造钛合金的强度和断裂韧度,在700℃或820℃保温2h退火处理,试样的断裂韧度较好,KQ.值分别达到78.11MPa·m1/2和79.44MPa·m1/2,屈服强度分别为782.74MPa和771.49MPa,抗拉强度分别为860.18MPa和853.0MPa,伸长率达8.10%和7.46%,获得了较好的强塑性匹配.
参考文献
[1] | Ohkubo C;Watanabe I;Ford JP;Nakajima H;Hosoi T;Okabe T .The machinability of cast titanium and Ti-6Al-4V.[J].Biomaterials,2000(4):421-428. |
[2] | Cui Chunxiang;Hu BaoMin;Zhao Lichen;Liu Shuangjin .Titanium alloy production technology, market prospects and industry development[J].Materials & design,2011(3):1684-1691. |
[3] | Bernd Oberwinkler;Martin Riedler;Wilfried Eichlseder .Importance of local microstructure for damage tolerant light weight design of Ti-6Al-4V forgings[J].International Journal of Fatigue,2010(5):808-814. |
[4] | 曹春晓.选材判据的变化与高损伤容限钛合金的发展[J].金属学报,2002(z1):4-11. |
[5] | CHANDRARAO B S;SRINIVAS M;KAMAT S V .Effect of temperature on fracture toughness of timetal 834 titanium alloy under mode Ⅰ and mixed Ⅰ/Ⅲ loading[J].Metallurgical and Materials Transactions,2008,39:1340-1349. |
[6] | CHEN Y Y;NIU H Z;KONG F T et al.Microstructure and fracture toughness of α β phase contain TiA1 alloy[J].Intermetallics,2011,19:1405-1410. |
[7] | Ji-kui Zhang .Total fatigue life prediction for Ti-alloys airframe structure based on durability and damage-tolerant design concept[J].Materials & design,2010(9):P.4329. |
[8] | 束德林.工程材料的力学行为[M].北京:机械工业出版社,2006:91-93. |
[9] | James C. Williams;Edgar A. Starke Jr. .Progress in structural materials for aerospace systems[J].Acta materialia,2003(19):5775-5799. |
[10] | ZHENG X L .On an unified model for predicting notch strength and fracture toughness[J].Engineering Fracture Mechanics,1989,33(05):685-695. |
[11] | N.-A. Noda;M. Sera;Y. Takase .Stress concentration factors for round and flat test specimens with notches[J].International Journal of Fatigue,1995(3):163-178. |
[12] | SHABARA M A;DOMINATY A A;ANSARY M D .Estimation of plane strain fracture toughness from circumferentially bluntly notched round-bar specimens[J].Engineering Fracture Mechanics,1996,54(04):533-541. |
[13] | 王峰会,鄢君辉,王泓.两种Al2O3结构陶瓷断裂强度的统计分析[J].稀有金属材料与工程,2000(05):311-314. |
[14] | 王泓,鄢君辉,郑修麟.航空有机玻璃切口强度及切口敏感性估算[J].机械强度,2001(02):131-133. |
[15] | 张旺峰,李兴无,马济民,曹春晓,朱知寿.组织类型对钛合金损伤容限性能的影响及电镜原位观察[J].航空材料学报,2006(03):313-314. |
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