Abstract
Spray forming (SF) is a near net shape manufacturing process in a wide variety of alloys. A titanium- and cobalt-modified repair alloy has been prepared by the SF process and was presented excellent properties of friction and wear in previous published article. In this paper, the microstructural evolution of the alloy exposed at 750 °C for different isothermal aging time was analyzed. Microstructure observations reveal that equiaxed grains formed in the ingots whether after aging process or not. The size and the volume fraction of γ′ precipitates increase with the ongoing of aging process, which could result in the change of the lattice misfit of γ′/γ and the precipitation of new σ, η phases. Intergranular fracture and transgranular fracture are main fracture mechanisms in aged state. Its tensile properties were attributed to the size and the volume fraction of γ′ precipitates, γ′/γ misfit, grain boundary carbides and the number of harmful phases (σ and η phases) during aging process.
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 callDisclaimer: 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.
