Abstract
Fine-grained W-Ni-Mn-Y2O3 alloys were fabricated by mechanical alloying-assisted spark plasma sintering (SPS), and the effects of Y2O3 content on the microstructure and mechanical properties of the alloys were studied. Fine-grained 90W-6Ni-4Mn-Y2O3 alloys with uniform microstructure and excellent properties were prepared by SPS at 1150 °C. The addition of trace Y2O3 inhibited the sintering densification process and refined the W grain size. The average W grain size decreased from 5.5 μm to 2.1 μm. The fracture mode changed from W grain transgranular fracture and W–W interface fracture to W–W and W-Matrix phase interface fracture. The Rockwell hardness and bending strength of alloys initially increased and then decreased with increasing Y2O3 content. The optimum comprehensive mechanical properties (Rockwell hardness and bending strength) of the alloys were obtained at the same time when the mass fraction of Y2O3 was 0.4%.
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.
