Laser powder bed fusion of a Co–Al–W-based composite: Effects of Y2O3 nanoparticles on crack elimination, microstructure and mechanical properties

Guo，Chuan1; Zhou，Yang2,3; Yin，Yu1; Liu，Rui4; Zhu，Qiang3

2024-07-01

10.1016/j.msea.2024.146717

Materials Science and Engineering: A   影响因子和分区

0921-5093

In order to meet the aerospace industry's growing demand for higher-temperature and more-efficient materials, Co–Al–W-based superalloy was invented in 2006 and is expected to become the next generation of potential superalloys for aero engines. Laser powder bed fusion, as a type of additive manufacturing technology, is considered to be an advanced method for manufacturing aerospace components. However, for Co–Al–W-based superalloy, cracking commonly occurs during this process. To solve the cracking in the non-weldable Co–Al–W-based superalloy during laser powder bed fusion, 0.5 wt% YO nanoparticles were added to this alloy, forming a Co–Al–W-based composite. The results show that the cracks that formed in the Co–Al–W-based superalloy were attributed to the solidification cracking owing to the formation of the Laves phase in the inter-dendritic region. The added YO nanoparticles presented a stable chemical state without extra reactions with other elements during the laser powder bed fusion process. They played a heterogeneous nucleation role to induce columnar to equiaxed transition, where the microstructure was refined, and the cracks were eliminated. As a result, the tensile performance was dramatically improved.

Co–Al–W-Based composite Crack elimination Laser powder bed fusion Mechanical properties Microstructure

SCI ; EI

英语

其他

20242216160379

Aerospace industry ; Aircraft engines ; Cracks ; Nanoparticles ; Nucleation ; Textures

Metallurgy and Metallography:531 ; Aircraft Engines, General:653.1 ; Nanotechnology:761 ; Solid State Physics:933 ; Crystal Growth:933.1.2

MATERIALS SCIENCE

2-s2.0-85194101583

Scopus

1.School of Advanced Manufacturing,Sun Yat-sen University,Shenzhen,518107,China
2.BYD Auto Industry Co.,Ltd,Shenzhen,518000,China
3.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China
4.Shenyang National Laboratory for Materials Science,Northeastern University,Shenyang,110819,China

Guo，Chuan,Zhou，Yang,Yin，Yu,等. Laser powder bed fusion of a Co–Al–W-based composite: Effects of Y2O3 nanoparticles on crack elimination, microstructure and mechanical properties[J]. Materials Science and Engineering: A,2024,904.

Guo，Chuan,Zhou，Yang,Yin，Yu,Liu，Rui,&Zhu，Qiang.(2024).Laser powder bed fusion of a Co–Al–W-based composite: Effects of Y2O3 nanoparticles on crack elimination, microstructure and mechanical properties.Materials Science and Engineering: A,904.

Guo，Chuan,et al."Laser powder bed fusion of a Co–Al–W-based composite: Effects of Y2O3 nanoparticles on crack elimination, microstructure and mechanical properties".Materials Science and Engineering: A 904(2024).