Y2O3 nanoparticles decorated IN738LC superalloy manufactured by laser powder bed fusion : Cracking inhibition, microstructures and mechanical properties

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

6 Scopus Citations
View graph of relations

Author(s)

  • Chuan Guo
  • Zhengrong Yu
  • Xiaogang Hu
  • Fan Zhou
  • Zhen Xu
  • Shuang Han
  • Yang Zhou
  • R. Mark Ward
  • Qiang Zhu

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number109555
Journal / PublicationComposites Part B: Engineering
Volume230
Online published6 Dec 2021
Publication statusPublished - 1 Feb 2022

Abstract

In-situ Y2O3 nanoparticles decorated Inconel 738 LC composite by powder mixture is fabricated using laser powder bed fusion with different scan speeds and laser powers. The process window is significantly enlarged with the addition of 0.05 wt% Y2O3 by removing the cracks in the as-printed parts. Well-dispersed Y4Al2O9 particles are formed during the reaction between the mixed powders and the laser beam. Obvious enrichment of Zr in the Y4Al2O9 particles by substitution for the yttrium is observed, which effectively eliminates the segregation of Zr along the grain boundaries. In this case, the cracks are mitigated since the formation of liquid film is correspondingly hindered at the last stage of solidification. In addition, the gains are coarsened to nearly double the size with the incorporation of Y2O3 nanoparticles before and after heat treatment. As a result, the Y2O3-inoculated Inconel 738 LC exhibits an improved strength at 850 °C.

Research Area(s)

  • Cracking, Laser powder bed fusion, Mechanical properties, Metal-matrix composites, Microstructure

Citation Format(s)

Y2O3 nanoparticles decorated IN738LC superalloy manufactured by laser powder bed fusion : Cracking inhibition, microstructures and mechanical properties. / Guo, Chuan; Yu, Zhengrong; Hu, Xiaogang; Li, Gan; Zhou, Fan; Xu, Zhen; Han, Shuang; Zhou, Yang; Ward, R. Mark; Zhu, Qiang.

In: Composites Part B: Engineering, Vol. 230, 109555, 01.02.2022.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review