Additively manufactured SiC-reinforced stainless steel with excellent strength and wear resistance
By Chao-lin Tan, Z. Qiu, Wenyou Ma, M. Kuang, D. Zeng. 2021
147 citations recorded by the source corpus.
Abstract Additive manufacturing enables in-situ alloying of multi-component materials for the development of novel and high-performance materials. Here laser powder bed fusion (LPBF) of SiC-reinforced 316 L stainless steels metallic matrix composites (MMCs) for improved strength and wear resistance were investigated. The densification behaviour, microstructural evolution, crystallographic orientation and properties of the LPBF-processed MMCs with different SiC contents were systematically investigated. The formation mechanisms of pores and cracks are discussed. Microstructural observations reveal that the microstructure changes from equiaxed to dendritic with increasing SiC are related to the different temperature gradient and solidification rates. The SiC addition affects crystallographic orientation and causes grain refinement to 316 L. In addition, micron SiC particles are refined to nano-scale after laser processing, which induces massive dislocations in the 316 L matrix. The strength and tribological properties of 316 L are significantly improved by SiC addition, in which the 9 vol. % SiC reinforced MMC reaches a high tensile strength of about 1.3 GPa, together with a low wear rate of 0.77×10-5 mm3/Nm. The achieved strength and wear resistance are at the highest level among literature, and the underlying strengthening mechanisms are elucidated.
Subfields: Automotive Engineering, Mechanical Engineering
View Paper: https://www.semanticscholar.org/paper/c493cb4223ca287499fdc4f85aeec04dab8dbb03
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Citations in the corpus
- Additive manufacturing of bio-inspired multi-scale hierarchically strengthened lattice structures (2021, methodology): “where φ is a constant around the order of 2 [62]; G is the shear modulus, which is around 62 GPa in HT samples as estimated by micropillar compression tests in section 3.”