Failure Analysis of a 17-4PH Stainless Steel Part in an Exhaust Fastener

Yousefi, Masoud; Rajabi, Masoud; Kerahroodi, Mohamammad Sadegh Amiri

doi:10.1007/s11668-021-01291-8

Cited by 2 publications

(1 citation statement)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The present research focuses on the precipitation-hardened martensitic stainless steel 17-4 PH, a material well known for its applications in aviation [1], automotive [2], medical [3], tooling [4], marine [5], nuclear, military, food, and petroleum sectors [6][7][8], due to its good resistance to high temperature, fracture, oxidation, and corrosion, the main objective being to find the differences in the mechanical and microstructural properties of this material manufactured via cold rolling and DMLS.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Microstructural and Mechanical Properties of 17-4 PH Stainless Steel by Cold Rolled and Machining vs. DMLS Additive Manufacturing

Moreno-Garibaldi,

Alvarez-Vera,

Beltrán-Fernández

et al. 2024

JMMP

View full text Add to dashboard Cite

The 17-4 PH stainless steel is widely used in the aerospace, petrochemical, chemical, food, and general metallurgical industries. The present study was conducted to analyze the mechanical properties of two types of 17-4 PH stainless steel—commercial cold-rolled and direct metal laser sintering (DMLS) manufactured. This study employed linear and nonlinear tensile FEM simulations, combined with various materials characterization techniques such as tensile testing and nanoindentation. Moreover, microstructural analysis was performed using metallographic techniques, optical microscopy, scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD). The results on the microstructure for 17-4 PH DMLS stainless steel reveal the layers of melting due to the laser process characterized by complex directional columnar structures parallel to the DMLS build direction. The mechanical properties obtained from the simple tension test decreased by 17% for the elastic modulus, 7.8% for the yield strength, and 7% for the ultimate strength for 17-4 PH DMLS compared with rolled 17-4 PH stainless steel. The FEM simulation using the experimental tension test data revealed that the 17-4 PH DMLS stainless steel experienced a decrease in the yield strength of ~8% and in the ultimate strength of ~11%. A reduction of the yield strength of the material was obtained as the grain size increased.

show abstract