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Microstructural Influences on High Cycle Fatigue Crack Initiation Mechanism in Ti-Al-Mo-Cr-V-Nb-Zr-Sn Metastable β Titanium Alloy.

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Title: Microstructural Influences on High Cycle Fatigue Crack Initiation Mechanism in Ti-Al-Mo-Cr-V-Nb-Zr-Sn Metastable β Titanium Alloy.
Authors: Zhao, Chenxi1 (AUTHOR) zhaochenxi@mail.nwpu.edu.cn, Wang, Yongxin1 (AUTHOR) rhu@nwpu.edu.cn, Hu, Rui1 (AUTHOR) wyx0214@mail.nwpu.edu.cn, Shang, Guoqiang2 (AUTHOR) shanggq1984@126.com, Wu, Yuxue1 (AUTHOR) luyunmei@mail.nwpu.edu.cn, Lu, Yunmei1 (AUTHOR)
Source: Materials (1996-1944). Jan2025, Vol. 18 Issue 2, p336. 17p.
Subject Terms: *CRACK initiation (Fracture mechanics), *FATIGUE limit, *FRACTOGRAPHY, *CRYSTAL orientation, *MICROSTRUCTURE, *MICROCRACKS, *HIGH cycle fatigue
Abstract: In this work, the high cycle fatigue behavior and tensile properties of Ti-Al-Mo-Cr-V-Nb-Zr-Sn titanium alloy at room temperature with a basketweave structure and bimodal structure were studied. The results show that the fatigue strength of the basketweave structure is higher, while the balance of strength and plasticity of the bimodal microstructure is better. However, the fatigue performance of the bimodal microstructure is unstable due to the bilinear phenomenon of the S-N curve. By fractographic analysis and the study of the crystal orientation, as well as the slip traces of the primary α grains and β matrix at the facets, it was found that the facets are formed on the { 10 1 ¯ 1 }< 11 2 ¯ 0 > slip system with the highest Schmid factor, and the microcracks grow along the { 110 }< 111 > slip system in the β grain, but the driving force of microcrack propagation may exceed the restriction of crystallographic orientation. Based on the conclusions above, the phenomenological models of the fatigue crack initiation mechanism of Ti-Al-Mo-Cr-V-Nb-Zr-Sn titanium alloy are established. [ABSTRACT FROM AUTHOR]
Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Microstructural Influences on High Cycle Fatigue Crack Initiation Mechanism in Ti-Al-Mo-Cr-V-Nb-Zr-Sn Metastable β Titanium Alloy.
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  Data: &lt;searchLink fieldCode=&quot;JN&quot; term=&quot;%22Materials+%281996-1944%29%22&quot;&gt;Materials (1996-1944)&lt;/searchLink&gt;. Jan2025, Vol. 18 Issue 2, p336. 17p.
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  Label: Abstract
  Group: Ab
  Data: In this work, the high cycle fatigue behavior and tensile properties of Ti-Al-Mo-Cr-V-Nb-Zr-Sn titanium alloy at room temperature with a basketweave structure and bimodal structure were studied. The results show that the fatigue strength of the basketweave structure is higher, while the balance of strength and plasticity of the bimodal microstructure is better. However, the fatigue performance of the bimodal microstructure is unstable due to the bilinear phenomenon of the S-N curve. By fractographic analysis and the study of the crystal orientation, as well as the slip traces of the primary α grains and β matrix at the facets, it was found that the facets are formed on the { 10 1 &#175; 1 }&lt; 11 2 &#175; 0 &gt; slip system with the highest Schmid factor, and the microcracks grow along the { 110 }&lt; 111 &gt; slip system in the β grain, but the driving force of microcrack propagation may exceed the restriction of crystallographic orientation. Based on the conclusions above, the phenomenological models of the fatigue crack initiation mechanism of Ti-Al-Mo-Cr-V-Nb-Zr-Sn titanium alloy are established. [ABSTRACT FROM AUTHOR]
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  Label:
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  Data: &lt;i&gt;Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder&#39;s express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.&lt;/i&gt; (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.3390/ma18020336
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      – Code: eng
        Text: English
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        PageCount: 17
        StartPage: 336
    Subjects:
      – SubjectFull: CRACK initiation (Fracture mechanics)
        Type: general
      – SubjectFull: FATIGUE limit
        Type: general
      – SubjectFull: FRACTOGRAPHY
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      – SubjectFull: CRYSTAL orientation
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      – SubjectFull: MICROSTRUCTURE
        Type: general
      – SubjectFull: MICROCRACKS
        Type: general
      – SubjectFull: HIGH cycle fatigue
        Type: general
    Titles:
      – TitleFull: Microstructural Influences on High Cycle Fatigue Crack Initiation Mechanism in Ti-Al-Mo-Cr-V-Nb-Zr-Sn Metastable β Titanium Alloy.
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            NameFull: Zhao, Chenxi
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            NameFull: Wang, Yongxin
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            NameFull: Shang, Guoqiang
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            NameFull: Wu, Yuxue
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            – D: 15
              M: 01
              Text: Jan2025
              Type: published
              Y: 2025
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            – TitleFull: Materials (1996-1944)
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