We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
A Study on the Brittle-to-Ductile Transition Temperature of Forged β-Solidifying TiAlMn and TNM Alloys.
- Authors
Su, Xiang; Li, Pei; Qu, Hongjie; Feng, Chenming; Hou, Rui; Song, Weidong; Tian, Bo; Xu, Hao
- Abstract
To further determine the brittle-to-ductile transition temperature, the microstructures and mechanical properties of typical forged β-solidifying Ti-42Al-5Mn (TiAlMn) and Ti-43Al-4Nb-1Mo-0.5B (TNM) alloys were studied. The results show that the microstructures of both heat-treated alloys consist of γ/α2 lamellar colony, equiaxed γ phase, and β0 phase. In addition, the globular α2 phase appears in the TNM alloy. The yield strength of TiAlMn alloy increases gradually with the testing temperature, whereas a significant drop from 605 MPa to 469 MPa occurs between 650 °C and 700 °C. In contrast, the TNM alloy exhibits a declining trend with the increasing testing temperature, and a remarkable reduction is observed in the temperature range of 700 °C–750 °C. Moreover, the fracture mode transition from transcrystalline cleavage to intercrystalline with increasing testing temperature was applied to the auxiliary judgment of brittle-to-ductile transition. As a result, the brittle-to-ductile transition temperatures of TiAlMn alloy and TNM alloy are about 650 °C–700 °C and 700 °C–750 °C, which may provide a reference for service temperature range of both alloys.
- Subjects
TRANSITION temperature; GLASS transition temperature; MICROSTRUCTURE
- Publication
Crystals (2073-4352), 2022, Vol 12, Issue 10, p1498
- ISSN
2073-4352
- Publication type
Article
- DOI
10.3390/cryst12101498