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Microstructure Characterization and Thermal Stability of TNM Alloy Fabricated by Powder Hot Isostatic Pressing
| Content Provider | MDPI |
|---|---|
| Author | Wang, Yichao Xue, Xiangyi Kou, Hongchao Qiang, Fengming Yu, Yonghao Yin, Zhongwei Li, Jinshan |
| Copyright Year | 2021 |
| Description | A TNM alloy ingot was fabricated with powder hot isostatic pressing (P-HIP) and short-time exposure treatment conducted at 750–1050 °C for 2–5 h. The tensile mechanical properties were investigated at room temperature and 800 °C. The results revealed that a fully lamellar microstructure of P-HIPed TNM alloy with only 0.3 vol.% $β_{0}$ phase could be obtained by hot isostatic pressing at 1260 °C, under the pressure of 170 MPa, held for 4 h. When the exposure temperature was below 850 °C, the $α_{2}$ lamellae were transformed into nano-scaled $(α_{2}$ + γ) lamellae (i.e., the $α_{2}→α_{2}$ + γ transformation). With increases in the exposure temperature, the $β_{0}$ phase began to precipitate within the $α_{2}$ lamellae $(α_{2}→β_{0}$ transformation) at 950 °C. The $α_{2}$→γ and the $α_{2}→β_{0}$ transformation both happened at 950–1050 °C, and the higher exposure temperature accelerated the diffusion of Mo and facilitated the $α_{2}→β_{0}$ transformation. The yield strength and elongation at RT and 800 °C were both improved after short-time high-temperature exposure treatment. The uniform distribution and nano-scaled interfacial $β_{0}$ phase provided precipitation strengthening and were not harmful to the elongation. |
| Starting Page | 1720 |
| e-ISSN | 20754701 |
| DOI | 10.3390/met11111720 |
| Journal | Metals |
| Issue Number | 11 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-10-28 |
| Access Restriction | Open |
| Subject Keyword | Metals Manufacturing Engineering Tial-based Alloys Hot Isostatic Pressing Microstructure Thermal Stability Tensile Properties |
| Content Type | Text |
| Resource Type | Article |
