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Micro and nanohardness testing of laser welds
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SYSNO ASEP 0436152 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Micro and nanohardness testing of laser welds Author(s) Šebestová, H. (CZ)
Čtvrtlík, Radim (FZU-D) RID, ORCID
Chmelíčková, H. (CZ)
Tomáštík, J. (CZ)Source Title Romanian Academy. Proceedings. Series A : Mathematics, Physics, Technical Sciences, Information Science - ISSN 1454-9069
Roč. 15, č. 3 (2014), s. 247-253Number of pages 7 s. Language eng - English Country RO - Romania Keywords Vickers microhardness ; depth sensing indentation ; laser welding Subject RIV JP - Industrial Processing R&D Projects TA01010517 GA TA ČR - Technology Agency of the Czech Republic (TA ČR) Institutional support FZU-D - RVO:68378271 UT WOS 000341803400005 EID SCOPUS 84907189034 Annotation Local mechanical properties of pulsed Nd:YAG laser bead-on-plate welds on 0.6 thick AISI 304 stainless steel were investigated. Conventional Vickers micro-hardness, based on measurement of dimension of residual indent, and depth sensing nanoindentation were used. Measurements were performed on both transversal and longitudinal weld cross sections. Seam welds performed with the pulsed laser reached very inhomogeneous microstructure resulting from the principle of successive pulses landing on the material surface whereas each pulse partially overlaps and re-melts the area melted by the previous one. This led to the fluctuations in both Vickers microhardness and indentation hardness of the weld metal. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2015
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