skip to main content
Idioma:

Effect of selective laser melting process parameters on the microstructure and properties of a precipitation hardening stainless steel

Fang, Ruirui ; Deng, Nana ; Zhang, Hongbin ; Wang, Gang ; Su, Yukuo ; Zhou, Haiping ; Gao, Kuidong ; Gu, Lianwang

Materials & design, 2021-12, Vol.212, p.110265, Article 110265 [Periódico revisado por pares]

Elsevier Ltd

Texto completo disponível

Citações Citado por
  • Título:
    Effect of selective laser melting process parameters on the microstructure and properties of a precipitation hardening stainless steel
  • Autor: Fang, Ruirui ; Deng, Nana ; Zhang, Hongbin ; Wang, Gang ; Su, Yukuo ; Zhou, Haiping ; Gao, Kuidong ; Gu, Lianwang
  • Assuntos: Corrax stainless steel ; Fracture surface ; Mechanical properties ; Selective laser melting ; Strengthening mechanism
  • É parte de: Materials & design, 2021-12, Vol.212, p.110265, Article 110265
  • Descrição: [Display omitted] •Corrax stainless steel based SLM were prepared under different process parameters.•Many lath martensite (above 99%) and LAGBs (above 50%) were formed in SLMed samples.•The best process parameter was determined as 190 W-1.1 m·s−1.•The sample under the optimal parameter, exhibited superior mechanical properties.•Dislocation strengthening dominated the strengthening mechanism of the SLMed sample. In this paper, selective laser melting (SLM) was used to manufacture corrax stainless steel samples under different parameters. It was found that the SLMed samples were mainly composed by lots of fine martensite (including cellular structure, cellular dendritic grains and blocky grains), and trace austenite. During SLM forming process, a large number of low-angle grain boundaries (LAGBs) and high-density dislocations were formed in the matrix. Meanwhile, the samples showed weak texture and no obvious preference orientation. Moreover, the relative density of all SLMed samples reached above 90%, and the relative density was above 97% when the laser energy density was 54.13–78.19 J·mm−3. Under the optimal process parameters of P = 190 W, V = 1.1 m·s−1, the relative density of sample reached above 99.52 ± 0.09%, while the sample exhibited the best mechanical properties, including the highest microhardness (374.2 ± 6.5HV), yield strength (YS = 946 ± 7.3 MPa), ultimate tensile strength (UTS = 1084 ± 3 MPa) and elongation (EL = 17.64 ± 0.18%). Moreover, the strengthening mechanisms of SLMed samples mainly included grain boundary strengthening, dislocation strengthening and precipitation strengthening, while dislocation strengthening played a dominant role. Besides that, the fracture mechanisms of SLMed samples belonged to ductile fracture, except for the samples prepared with laser energy density below 54.13 J·mm−3.
  • Editor: Elsevier Ltd
  • Idioma: Inglês
Voltar para lista de resultados

  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

Buscando em bases de dados remotas. Favor aguardar.