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Ultrasonically generated pulsed water jet peening of austenitic stainless-steel surfaces
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SYSNO ASEP 0490276 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Ultrasonically generated pulsed water jet peening of austenitic stainless-steel surfaces Author(s) Srivastava, M. (IN)
Hloch, Sergej (UGN-S) RID, SAI, ORCID
Tripathi, R. (IN)
Kozak, D. (HR)
Chattopadhyaya, S. (IN)
Dixit, A. R. (IN)
Foldyna, Josef (UGN-S) RID, ORCID
Hvizdoš, P. (SK)
Fides, M. (SK)
Adamčík, P. (CZ)Number of authors 10 Source Title Journal of Manufacturing Processes. - : Elsevier - ISSN 1526-6125
Roč. 32, č. 32 (2018), s. 455-468Number of pages 14 s. Publication form Online - E Language eng - English Country US - United States Keywords pulsating water jet ; peening ; residual stress ; acoustic emission Subject RIV JQ - Machines ; Tools OECD category Mechanical engineering R&D Projects LO1406 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UGN-S - RVO:68145535 UT WOS 000435057100045 DOI 10.1016/j.jmapro.2018.03.016 Annotation In this study, the effects of pulsating water jets were investigated as a surface treatment process using circular and flat nozzles by considering the integrity of a stainless steel (AISI 304) surface. The local energy distribution was controlled by changing the traverse speed and the pulsating water jet (PWJ) effects were assessed in terms of the residual stress and strengthening effect. The strengthening effect of the process was evaluated by measuring the micro-hardness of the treated surface and by studying the impact of the treatment on the surface based on micro-structural analyses using scanning electron microscope (SEM). The residual stress of the subjected area was evaluated using X-ray diffraction technique. Based on the results from the studied samples, it was found that the initial tensile residual stress was relieved and converted to a compressive residual stress. An increase in the hardness of the treated samples was also observed as compared to the untreated samples up to certain depth along the cross-section of the treated region. The micro-structural examination of the samples revealed the plastic deformation that occurred during the treatment process. Additionally, the acoustic emission (AE) generated during the impact was used as an online monitoring tool for observing the behaviour of the elicited signals under different parametric conditions, and as a control mechanism for obtaining better results. The experimental results show that the pulsating water jet constitutes a new potential technology for surface treatment processes. Workplace Institute of Geonics Contact Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Year of Publishing 2019 Electronic address https://www.sciencedirect.com/science/article/pii/S1526612518301270
Number of the records: 1