ISSN: 1003-6326
CN: 43-1239/TG
CODEN: TNMCEW

Vol. 33    No. 5    May 2023

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Mechanical properties and deformation behaviors of Ti-5Al-5Mo-1Fe-1Cr alloy with duplex and single-phase microstructures
Chao-qiang LIU1, Zong-yu XIE1, Xiao-yong ZHANG1, Hong-ge YAN2, Ke-chao ZHOU1, Min SONG1
(1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;
2. College of Materials Science and Engineering, Hunan University, Changsha 410082, China
)
Abstract: To clarify the differences of mechanical properties and deformation behaviors of a Ti-5Al-5Mo-1Fe-1Cr (wt.%) alloy with duplex and single-phase microstructures, the tensile properties and deformation modes of the alloy with these two different microstructures were studied systematically. The results show that the sample with the duplex microstructure has a tensile yield strength of 886 MPa, an ultimate tensile strength of 1075 MPa and an elongation of 21.5%. The sample with the single β phase has a relatively lower strength and a similar elongation. The sample with the duplex microstructure has a ductile fracture mode and deforms via dislocation slipping in the β matrix and spherical or plate-like α phases. The slip systems are in β matrix, and and in α phase. In contrast, the single-phase sample has a quasi-cleavage fracture mode and deforms via dislocation slipping and stress- induced α″ martensite transformation, and the slip systems are and .
Key words: near β-Ti alloys; mechanical properties; deformation behavior; dislocation slipping; stress-induced martensite transformation
Superintended by The China Association for Science and Technology (CAST)
Sponsored by The Nonferrous Metals Society of China (NFSOC)
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