Metallographic and Fractographic Analysis of Plastic Deformation of Austenitic Stainless Steel AISI 304 after Static and Dynamic Loading

Abstract:

This paper presents a metallographic and fractographic study of AISI 304 austenitic stainless steel subjected to mechanical loading in the sensitized condition. Static three-point bending tests and impact tests were carried out to evaluate how sensitization affects the mechanical response and fracture behaviour of AISI 304. The study compares the initial state of the material with its condition after sensitization at 700 °C for 10 h, with emphasis on changes in plastic deformation and fracture mechanisms. Microstructural evaluation was performed using light microscopy, while Vickers microhardness measurements provided insight into local mechanical changes. Fractographic analysis using scanning electron microscopy revealed differences in fracture surface morphology. Results demonstrate a decrease in microhardness, reduced impact energy, and noticeable differences in fracture morphology following the sensitization treatment, indicating that the heat treatment influences both the mechanical response and failure behaviour of AISI 304.

• Periodical: Solid State Phenomena (Volume 386)
• Pages: 99-105
• DOI: https://doi.org/10.4028/p-tF60oN
• Online since: March 2026
• Authors: Veronika Chvalníková*, Milan Uhríčik, Martin Slezák, Juraj Belan, Tomaš Vlach
• Keywords: Austenitic Steel, Fracture Surface, Mechanical Loading, Microstructure, Plastic Deformation, Sensitization

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