Journal
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
Volume 20, Issue -, Pages 748-762Publisher
ELSEVIER
DOI: 10.1016/j.jmrt.2022.07.107
Keywords
Shot peening; Barkhausen noise; Austenitic steel; X-ray diffraction; Electron diffraction; Strain-induced martensite
Funding
- European Regional Development Fund
- KEGA [010ZU-4/2021]
- Center for advanced applied science? [1/0052/22, CZ.02.1.01/0.0/0.0/16_019/0000778]
- VEGA [1/0052/22]
- Center for advanced applied science within the Operational Program Research, Development [CZ.02.1.01/0.0/0.0/16_019/0000778]
- Grant Agency of the Czech Technical University in Prague [SGS22/183/OHK4/3T/14]
Ask authors/readers for more resources
This study investigates magnetic Barkhausen noise emission produced by strain-induced martensite during shot peening of AISI 304 stainless steel. The strength of Barkhausen noise is mainly influenced by the number of shot peening cycles, peening intensity, volume fraction of strain-induced martensite, and its depth, while the role of residual stress in the martensite phase is minor.
This study deals with magnetic Barkhausen noise emission produced by strain-induced martensite generated during shot peening of austenitic AISI 304 stainless steel. The transformation from the paramagnetic to ferromagnetic state and the corresponding birth of the magnetic domain structure are important with respect to irreversible motion of domain walls and the corresponding Barkhausen noise emission. Barkhausen noise is investigated and explained with respect to the residual stress state as well as the micro-structure expressed in terms of the martensite fraction, its crystallite size, preferred orientation, surface topography, and microhardness. The strength of the Barkhausen noise is mainly linked with the number of shot peening cycles, corresponding Almen intensity, and the associated volume fraction of strain-induced martensite as well as the extent of its depth. The role of the residual stress state in the martensite phase is minor. Surface strengthening expressed in terms of the microhardness in the near-surface region is very high for the medium shot peening intensity. A remarkable decrease in the near-surface microhardness as well as the presence of heavily thinned folds indicate over shot peen-ing and surface microcracking in the case of a longer shot peening time and the corre-sponding higher Almen intensity.(c) 2022 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available