Research on the formation process of selective laser melting Mg–Y–Sm–Zn–Zr alloy. Issue 2 (22nd January 2021)

• Record Type: Journal Article
• Authors: Wang, Wenli; He, Lun; Yang, Xin; Wang, Dan
• Is Part Of: Materials science and technology. Volume 37:Issue 2(2021)
• Page Start: 174
• Page End: 181
• Publication Date: 2021-01-22
• Subjects: Mg–Y–Sm–Zn–Zr alloy -- selective laser melting -- formation process -- relative density -- crack -- spheroidization phenomenon -- evaporation -- microstructure; Materials science -- Periodicals; Microstructure -- Periodicals; Metallurgy -- Periodicals; 620.1105
• DOI: 10.1080/02670836.2021.1874122
• Languages: English
• ISSNs: 0267-0836

Abstract

Abstract : Selective laser melting technology was proposed to form the multi-element mixed rare earth magnesium alloys of Mg–3.4Y–3.6Sm–2.6Zn–0.8Zr (wt-%). The formation process, relative density, evaporation, microstructure and microhardness of the deposited samples at different laser power and scanning speed were characterised. Under the experimental conditions with a laser power of 40 W and a scanning speed of 300 mm s −1, the maximum relative density of the sample is 98.6%. The evaporation of elements exists but is not serious under all process parameters. Compared with the as-cast process, the microstructure of the samples prepared by SLM is mainly composed of α-Mg matrix and (Mg, Zn)3 (Y, Sm) eutectic phase, Mg12 (Y, Sm)Zn eutectic phase and LPSO structure are not found.