High-Stress Compressive Creep Behavior of Ti-6Al-4V ELI Alloys with Different Microstructures
Influence of initial microstructure of Ti-6Al-4V ELI alloys on their compressive creep behavior at ambient temperature was investigated with applying compression stresses from 695 to 1092 MPa The experimental results show that the basketweave alloys have better compressive creep resistances than tho...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2020-01-01
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| Series: | MATEC Web of Conferences |
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| Online Access: | https://www.matec-conferences.org/articles/matecconf/pdf/2020/17/matecconf_ti2019_11007.pdf |
| _version_ | 1819146143318147072 |
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| author | Dan Zhenhua Lu Jiafei Chang Hui Qu Ping Zhang Aifeng Fang Zhigang Dong Yuecheng Wang Ying Zhou Lian |
| author_facet | Dan Zhenhua Lu Jiafei Chang Hui Qu Ping Zhang Aifeng Fang Zhigang Dong Yuecheng Wang Ying Zhou Lian |
| author_sort | Dan Zhenhua |
| collection | DOAJ |
| description | Influence of initial microstructure of Ti-6Al-4V ELI alloys on their compressive creep behavior at ambient temperature was investigated with applying compression stresses from 695 to 1092 MPa The experimental results show that the basketweave alloys have better compressive creep resistances than those duplex ones. The constitutive equations in steady-state compressive creeps of duplex or basketweave structure are calculated to be =2.77×10-15(σ-710)2.1 and =2.36×10-14(σ-740)1.7 by fitting the linear regression creep curves after uniaxial compression tests. The noticeable compressive creep strains occur when the applied compression stresses are higher than the threshold stresses, i.e. 710 MPa for duplex Ti-6Al-4V ELI alloys and 740 MPa for basketweave alloys. Microstructural analysis indicates that the creep deformation of Ti-6Al-4V ELI alloys at ambient temperature is mainly controlled by dislocation slip. The creep behavior of Ti-6Al-4V ELI alloy with duplex microstructure is controlled by dislocation slip, like slip dislocations with a-type Burgers vector sliding on the basal or prismatic planes and a few c+a type dislocation sliding on the pyramidal planes. While creep mechanism for basketweave ones is dislocation glide controlled by c+a type Burgers vector sliding on the pyramidal planes and a-type sliding on the basal or prismatic planes. |
| first_indexed | 2024-12-22T13:09:14Z |
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| id | doaj.art-f7f3b5d28f1244d493ba6adddda611d8 |
| institution | Directory Open Access Journal |
| issn | 2261-236X |
| language | English |
| last_indexed | 2024-12-22T13:09:14Z |
| publishDate | 2020-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | MATEC Web of Conferences |
| spelling | doaj.art-f7f3b5d28f1244d493ba6adddda611d82022-12-21T18:24:48ZengEDP SciencesMATEC Web of Conferences2261-236X2020-01-013211100710.1051/matecconf/202032111007matecconf_ti2019_11007High-Stress Compressive Creep Behavior of Ti-6Al-4V ELI Alloys with Different MicrostructuresDan ZhenhuaLu JiafeiChang HuiQu Ping0Zhang Aifeng1Fang Zhigang2Dong Yuecheng3Wang Ying4Zhou Lian5China Ship Scientific Research CenterChina Ship Scientific Research CenterNaval Academy of ArmamentCollege of Materials Science and Engineering and Tech Institute for Advanced Materials, Nanjing Tech UniversityState Key Laboratory of Metal Materials for Marine Equipment and Applications, Anshan Iron and Steel CompanyCollege of Materials Science and Engineering and Tech Institute for Advanced Materials, Nanjing Tech UniversityInfluence of initial microstructure of Ti-6Al-4V ELI alloys on their compressive creep behavior at ambient temperature was investigated with applying compression stresses from 695 to 1092 MPa The experimental results show that the basketweave alloys have better compressive creep resistances than those duplex ones. The constitutive equations in steady-state compressive creeps of duplex or basketweave structure are calculated to be =2.77×10-15(σ-710)2.1 and =2.36×10-14(σ-740)1.7 by fitting the linear regression creep curves after uniaxial compression tests. The noticeable compressive creep strains occur when the applied compression stresses are higher than the threshold stresses, i.e. 710 MPa for duplex Ti-6Al-4V ELI alloys and 740 MPa for basketweave alloys. Microstructural analysis indicates that the creep deformation of Ti-6Al-4V ELI alloys at ambient temperature is mainly controlled by dislocation slip. The creep behavior of Ti-6Al-4V ELI alloy with duplex microstructure is controlled by dislocation slip, like slip dislocations with a-type Burgers vector sliding on the basal or prismatic planes and a few c+a type dislocation sliding on the pyramidal planes. While creep mechanism for basketweave ones is dislocation glide controlled by c+a type Burgers vector sliding on the pyramidal planes and a-type sliding on the basal or prismatic planes.https://www.matec-conferences.org/articles/matecconf/pdf/2020/17/matecconf_ti2019_11007.pdfti-6al-4v eli alloyhigh-stress compressive creepconstitutive equationdislocations |
| spellingShingle | Dan Zhenhua Lu Jiafei Chang Hui Qu Ping Zhang Aifeng Fang Zhigang Dong Yuecheng Wang Ying Zhou Lian High-Stress Compressive Creep Behavior of Ti-6Al-4V ELI Alloys with Different Microstructures MATEC Web of Conferences ti-6al-4v eli alloy high-stress compressive creep constitutive equation dislocations |
| title | High-Stress Compressive Creep Behavior of Ti-6Al-4V ELI Alloys with Different Microstructures |
| title_full | High-Stress Compressive Creep Behavior of Ti-6Al-4V ELI Alloys with Different Microstructures |
| title_fullStr | High-Stress Compressive Creep Behavior of Ti-6Al-4V ELI Alloys with Different Microstructures |
| title_full_unstemmed | High-Stress Compressive Creep Behavior of Ti-6Al-4V ELI Alloys with Different Microstructures |
| title_short | High-Stress Compressive Creep Behavior of Ti-6Al-4V ELI Alloys with Different Microstructures |
| title_sort | high stress compressive creep behavior of ti 6al 4v eli alloys with different microstructures |
| topic | ti-6al-4v eli alloy high-stress compressive creep constitutive equation dislocations |
| url | https://www.matec-conferences.org/articles/matecconf/pdf/2020/17/matecconf_ti2019_11007.pdf |
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