Abstract
Powder metallurgy methods were utilized to prepare lanthanum-doped titanium–zirconium–molybdenum (La-TZM) and traditional TZM alloy plates. Tensile and Charpy impact tests were employed to study the room temperature and cryogenic mechanical properties of the two kinds of TZM alloys. For the same process conditions, the lanthanum doping has significantly improved the tensile strength and elongation, which increased by 28.2% and 32.8%, respectively. For these process conditions, the La-TZM has higher density and smaller evenly distributed secondary phases. Compared with TZM, the secondary phase in La-TZM is finer, and hinders the spreading of cracks. This is why the La-TZM alloy plates have higher strength and elongation. By doping lanthanum, the ductile-to-brittle transition temperature of the TZM alloy decreased from −80°C to −120°C. The secondary phase La particles refine the grain and hinder fracture expansion across the grains during the impact fracture of the La-TZM alloy. TZM alloy improved room temperature and cryogenic mechanical properties significantly expand its application range.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: International Journal of Refractory Metals and Hard Materials
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
