Deformation Behavior and Tensile Properties of the Semi-Equiaxed Microstructure in Near Alpha Titanium Alloy
| Autor: | Minglang Luo, Wei Li, Yu Liang, Yilong Liang, Lei Zhou, Tingyi Lin, Han Moliu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Equiaxed crystals
Technology Materials science 02 engineering and technology Plasticity mechanical properties 01 natural sciences Article 0103 physical sciences Ultimate tensile strength General Materials Science Composite material Stress concentration in situ SEM test 010302 applied physics Microscopy QC120-168.85 deformation behavior Lüders band QH201-278.5 Titanium alloy 021001 nanoscience & nanotechnology Microstructure Engineering (General). Civil engineering (General) TK1-9971 Descriptive and experimental mechanics TA19 titanium alloy semi-equiaxed microstructure Electrical engineering. Electronics. Nuclear engineering Deformation (engineering) TA1-2040 0210 nano-technology |
| Zdroj: | Materials Materials, Vol 14, Iss 3380, p 3380 (2021) Volume 14 Issue 12 |
| ISSN: | 1996-1944 |
| Popis: | The tensile deformation and fracture behavior of a particular semi-equiaxed microstructure (S-EM) in a near alpha titanium alloy TA19 are investigated by an in situ method. In the S-EM, the thin β lamellae grow through the equiaxed αp phase (αp), and the original αp/βtrans interface in the bimodal microstructure largely disappears, forming a blurry interface between the semi-equiaxed αp phase (equiaxed αp phase that is grew through by the thin β lamellae) and the transformed β microstructure (βtrans). The formation of dense slip bands inside the semi-equiaxed αp phase in the S-EM is inhibited by the thin β lamellae during the tensile deformation. The special characteristics of the S-EM reduce the stress concentration at the interface, and the crack initiation probability in the blurry semi-αp/βtrans interface decreased compared to the distinct αp/βtrans interface in a conventional equiaxed microstructure (EM). Moreover, the ultimate tensile strength of the S-EM is higher than that of the EM with a slight loss of plasticity. |
| Databáze: | OpenAIRE |
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