Issues »  Volume 48, Issue 8

Microstructural and Phase Evolution of AISI 316 Stainless Steel Produced by Selective Laser Melting and Hot Rolling during Heat Treatment and Ultrasonic Impact Treatment

S. M. Voloshko$^{1}$, I. A. Vladymyrskyi$^{1}$, M. I. Anyakin$^{1}$, N. A. Shapovalova$^{1}$, M. M. Voron$^{1,2}$, A. P. Burmak$^{1}$

$^{1}$National Technical University of Ukraine ‘Igor Sikorsky Kyiv Polytechnic Institute’, 37 Beresteiskyi Ave., UA-03056 Kyiv, Ukraine
$^{2}$Physico-Technological Institute of Metals and Alloys, N.A.S. of Ukraine, 34/1 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine

Received: 03.07.2026; final version - 22.07.2026. Download: PDF

The effects of fabrication route, heat treatment, and ultrasonic impact treatment (UIT) on the microstructure, phase composition, microhardness, and residual stresses of AISI 316 stainless steel produced by selective laser melting (SLM) and hot rolling (HR) are investigated. The SLM material exhibits a fine cellular structure and higher austenite stability, manifested by a lower susceptibility to the deformation-induced γ → α' martensitic transformation compared with the hot-rolled steel. Heat treatment promotes microstructural homogenization, residual-stress relaxation, and an increase in the γ-phase fraction. UIT induces intense plastic deformation, refinement of coherent scattering domains, and compressive residual stresses. The maximum microhardness reaches 7.6 GPa for the hot-rolled steel and 6.7 GPa for the SLM material. The stronger hardening of the hot-rolled steel is associated with its greater susceptibility to deformation-induced martensitic transformation. Prior heat treatment significantly affects the response to subsequent UIT, with annealing followed by UIT providing the largest and most stable increase in microhardness. The results demonstrate the effectiveness of combining heat treatment and UIT for controlling the structural and phase state and mechanical characteristics of AISI 316 stainless steel produced by different fabrication routes.

Key words: AISI 316, additive manufacturing, heat treatment, ultrasonic impact treatment, microstructure, phase composition, microhardness.

URL: https://mfint.imp.kiev.ua/en/abstract/v48/i08/0865.html

DOI: https://doi.org/10.15407/mfint.48.08.0865

PACS: 43.35.+d, 61.72.Dd, 61.72.Ff, 61.72.Hh, 62.20.Qp, 81.20.Ev, 81.40.Ef

Citation: S. M. Voloshko, I. A. Vladymyrskyi, M. I. Anyakin, N. A. Shapovalova, M. M. Voron, and A. P. Burmak, Microstructural and Phase Evolution of AISI 316 Stainless Steel Produced by Selective Laser Melting and Hot Rolling during Heat Treatment and Ultrasonic Impact Treatment, Metallofiz. Noveishie Tekhnol., 48, No. 8: 865–888 (2026)

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