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

Guo，Chuan1,2,3; Yu，Zhengrong1,2; Hu，Xiaogang2,4; Li，Gan1,2,5; Zhou，Fan1,2; Xu，Zhen1,2; Han，Shuang6; Zhou，Yang1,2; Ward，R. Mark3; Zhu，Qiang1,2

2022-02-01

10.1016/j.compositesb.2021.109555

COMPOSITES PART B-ENGINEERING   影响因子和分区

1359-8368

In-situ YO 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% YO by removing the cracks in the as-printed parts. Well-dispersed YAlO particles are formed during the reaction between the mixed powders and the laser beam. Obvious enrichment of Zr in the YAlO 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 YO nanoparticles before and after heat treatment. As a result, the YO-inoculated Inconel 738 LC exhibits an improved strength at 850 °C.

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

SCI ; EI

英语

第一

20215011302799

Aluminum compounds ; Grain boundaries ; Laser beams ; Liquid films ; Metal nanoparticles ; Metallic matrix composites ; Powder metals ; Superalloys ; Zirconium

Metallurgy and Metallography:531 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Laser Beam Interactions:744.8 ; Nanotechnology:761 ; Materials Science:951

MATERIALS SCIENCE

2-s2.0-85120704191

Scopus

1.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Shenzhen Key Laboratory for Additive Manufacturing of High-Performance Materials,Shenzhen,518055,China
3.School of Metallurgy and Materials,University of Birmingham,Birmingham,Edgbaston,B15 2TT,United Kingdom
4.Academy for Advanced Interdisciplinary Studies,Southern University of Science and Technology,Shenzhen,518055,China
5.Department of Mechanical Engineering,City University of Hong Kong,Kowloon,China
6.Enhanced Composites and Structures Centre,School of Aerospace,Transport and Manufacturing,Cranfield University,MK43 0AL,United Kingdom

Guo，Chuan,Yu，Zhengrong,Hu，Xiaogang,et al. Y2O3 nanoparticles decorated IN738LC superalloy manufactured by laser powder bed fusion: Cracking inhibition, microstructures and mechanical properties[J]. COMPOSITES PART B-ENGINEERING,2022,230.

Guo，Chuan.,Yu，Zhengrong.,Hu，Xiaogang.,Li，Gan.,Zhou，Fan.,...&Zhu，Qiang.(2022).Y2O3 nanoparticles decorated IN738LC superalloy manufactured by laser powder bed fusion: Cracking inhibition, microstructures and mechanical properties.COMPOSITES PART B-ENGINEERING,230.

Guo，Chuan,et al."Y2O3 nanoparticles decorated IN738LC superalloy manufactured by laser powder bed fusion: Cracking inhibition, microstructures and mechanical properties".COMPOSITES PART B-ENGINEERING 230(2022).