Microstructure and mechanical properties of selective laser melted 18Ni300 steel

• Autorzy: Liang Yan , Qing Luo , Yu He , Huili Zhao , Yuxin Wang

Identyfikatory

DOI

10.2478/msp-2022-0031

• Języki publikacji: EN

Abstrakty

EN

The energy transfer process of selective laser melting (SLM) is highly complex. In this work, experiments were carried out to study the effects of SLM on the microstructure and mechanical properties of 18Ni300 martensitic steel. With the increase in laser power, the grain size of the cladding layer decreases and the microstructure becomes dense. The side hardness is higher than upper surface hardness, and the tensile strength and elongation both increase first and then decrease. When the laser power is 300 W and the scanning speed is 1,000 mm/s, the comprehensive mechanical properties are the best, as the tensile strength, microhardness, elongation at break, and elongation after fracture are 1,217 MPa, 37.5%, 37.6%, and 8.93%, respectively. EBSD (Electron Backscatter Diffraction) shows that columnar crystals grow along the growth direction (z direction) in XOZ and YOZ planes, and the grains show weak texture. There are many small-angle grain boundaries, and the grain sizes are <10 μm.

Słowa kluczowe

EN

selective laser melting; 18Ni300; temperature field; grain size

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2022
• Tom: Vol. 40, No. 3
• Strony: 64--71
• Opis fizyczny: Bibliogr. 23 poz., rys., tab.

Twórcy

autor

Liang Yan

• Dept. of Material Science and Engineering, School of Materials Science and Engineering, Jiang Su University of Science and Technology, zhenjiang 212100, China
• Dept. of Material Science and Engineering, School of Intelligent Manufacturing and Control Engineering, Shanghai Polytechnic University, Shanghai 201209, China

autor

Qing Luo

• Dept. of General Dentistry, Shsnghai Xuhui District Dental Center, Shanghai 200031, China

autor

Yu He

• Cancer Center, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China

autor

Huili Zhao

• Nursing Department, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China

autor

Yuxin Wang

• Dept. of Material Science and Engineering, School of Materials Science and Engineering, Jiang Su University of Science and Technology, zhenjiang 212100, China

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).