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Updated: Jun 20, 2025

Micromechanical Tension Testing of Additively Manufactured 17-4 PH Stainless Steel Specimens
Published on: April 7, 2021
Fracture behavior of additively manufactured corrax maraging stainless steel
Xiaojie Zhao1, Yang Gao1,2, Kai Zhao1
1PetroChina Research Institute of Petroleum Exploration & Development, Beijing, 100083, China.
Abstract:
Additively manufactured a low carbon Fe-Cr-Ni-Al Corrax stainless steel has ultra-high strength, but the mechanism at work when the steel cracks is still unclear. In this study, Corrax stainless steel was tensile tested to fracture and cracks in the vicinity of the fracture surface were analyzed by scanning electron microscope and electron-backscattered diffraction. The results show that the cracks propagated at angles of 45-60° to the tensile axis. Some cracks were transgranular, and high-angle grain boundaries had little effect on crack propagation. Crack propagation was inhibited in regions with lower Taylor factors. Kernel average misorientation value analysis established that the crack propagation process is accompanied by significant plastic deformation. The influence of particles and unfused pores on crack propagation is also discussed.
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