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Ti6321鈦合金動(dòng)態(tài)斷裂行為研究
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北京理工大學(xué)

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TG146.23

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爆炸科學(xué)與技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室基金（YBKT17-06）


Research on dynamic fracture behavior of Ti6321 Titanium Alloy
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    摘要:

    對(duì)Ti6321鈦合金進(jìn)行動(dòng)態(tài)三點(diǎn)彎曲加載，使其發(fā)生I型（張開型）斷裂并獲得波形曲線，結(jié)合實(shí)驗(yàn)-數(shù)值法獲得了三種組織Ti6321鈦合金的I型裂紋動(dòng)態(tài)斷裂性能。利用掃描電鏡、激光共聚焦顯微鏡對(duì)三種組織Ti6321鈦合金的斷口進(jìn)行觀察分析。結(jié)果表明，魏氏組織具有最高的I型裂紋動(dòng)態(tài)斷裂性能，雙態(tài)組織次之，等軸組織的動(dòng)態(tài)斷裂性能最低。對(duì)于I型裂紋斷口，等軸組織與雙態(tài)組織主要為韌性斷裂機(jī)制，而魏氏組織呈現(xiàn)出部分解理斷裂的特征。魏氏組織斷口的起伏最大，比表面積最大，裂紋擴(kuò)展需要消耗更多能量，因此斷裂性能較好。

    Abstract:

    The dynamic three-point bending loading was carried out on Ti6321 titanium alloy to cause mode I (open type) fracture and obtain the waveform curve. Combined with the experimental & numerical method, the mode I crack dynamic fracture properties of Ti6321 titanium alloy with three structures were obtained. The fracture surfaces of three kinds of Ti6321 titanium alloys were observed and analyzed by scanning electron microscope (SEM) and confocal laser scanning microscope (CLSM). The results show that the widmanstatten structure has the highest dynamic fracture performance of mode I crack, followed by the bimodal structure, and the equiaxed structure has the lowest dynamic fracture performance. For mode I crack fracture, equiaxed structure and bimodal structure are mainly ductile fracture mechanism, while widmanstatten structure has the characteristics of partial cleavage fracture. The Widmanstatten structure has the best fracture performance. Because of the largest fluctuation of fracture and the largest specific surface area, the crack propagation needs more energy.

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李嚴(yán)星,周哲,王琳,程煥武,程興旺. Ti6321鈦合金動(dòng)態(tài)斷裂行為研究[J].稀有金屬材料與工程,2023,52(3):953~958.[Li Yanxing, Zhou Zhe, Wang Lin, Cheng Huanwu, Cheng Xingwang. Research on dynamic fracture behavior of Ti6321 Titanium Alloy[J]. Rare Metal Materials and Engineering,2023,52(3):953~958.]
DOI：10.12442/j. issn.1002-185X.20220182

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歷史
  • 收稿日期:2022-03-08
  • 最后修改日期:2022-03-29
  • 錄用日期:2022-04-26
  • 在線發(fā)布日期: 2023-04-07
  • 出版日期: 2023-03-24