Magnetic, electric properties and hardness of 17-4 PH stainless steel fabricated by selective laser melting

Abstract

This research examines 17-4 PH stainless steel (SS) samples fabricated by selective laser melting (SLM). The samples were built in vertical direction, and it was necessary to load powder three times. This made the process suspended and led to the changes in temperature conditions. Despite a continuity of the samples, the samples were divided into three parts shared by visible interfaces. The samples were examined by optical microscopy and X-ray diffraction (XRD) analysis. The XRD data showed variations in phase compositions over the samples height. Magnetic and electric properties, hardness and microhardness of the samples in each parts were determined before and after the heat treatment (650 °C for 1 hour, cooling in a furnace). Obtained results show an inhomogeneity of properties over the samples height, but heat treatment led these properties to be uniformly distributed.

3D printing of magnetostrictive property in 17/4 ph stainless steel

“…This therefore forms a homogeneous structure with greater directional magnetisation than the AP track. The uniform magnetic properties can arise due to the γ(fcc)-α(bcc) after the heat treatment [42] .…”

Conventional and Additively Manufactured Stainless Steels: A Review

“…The results show that samples printed with scan 'X' strategy show higher hardness, relative density and retained austenite [158]. The corrosion test of laser powder bed fusion (LPBF) and wrought 17-4PH under electrochemical test and immersion exposure in 0.6 M NaCl depicts that LPBF exhibits a better corrosion resistance than wrought [159].…”

Effect of Solution Annealing Time on the Microstructure and Mechanical Properties of Selective-Laser-Melted 2205 Duplex Stainless Steel

“…Therefore, SLM has been widely applied to titanium alloys [8,9], aluminum alloys [10,11], copper alloys [12,13], nickel-based superalloys [14][15][16], and other metals [17,18]. Research on the SLM of stainless steel mainly focuses on austenitic stainless steel [19][20][21] and precipitation-hardened stainless steel [22][23][24], while research regarding the SLM of DSS is less common. Some research indicates that, unlike the excellent mechanical properties of other SLMmanufactured alloys, the microstructure of DSS manufactured by SLM is primarily ferritic (>95%), resulting in a high strength but poor elongation [3].…”