Počet záznamů: 1
Fatigue behavior of laser and hybrid laser-TIG welds of high-strength low-alloy steels
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SYSNO ASEP 0509287 Druh ASEP A - Abstrakt Zařazení RIV Záznam nebyl označen do RIV Zařazení RIV Není vybrán druh dokumentu Název Fatigue behavior of laser and hybrid laser-TIG welds of high-strength low-alloy steels Tvůrce(i) Šebestová, Hana (UPT-D) RID, ORCID, SAI
Horník, Petr (UPT-D) RID, ORCID, SAI
Mrňa, Libor (UPT-D) RID, ORCID, SAI
Horník, Vít (UFM-A)
Hutař, Pavel (UFM-A) RID, ORCID
Jambor, M. (SK)
Doležal, P. (CZ)Celkový počet autorů 7 Zdroj.dok. Lasers in Manufakturing. LIM 2019. Book of Abstracts. - München : WLT, 2019 Poč.str. 7 s. Forma vydání Nosič - C Akce Lasers in Manufakturing. LIM 2019 Datum konání 24.06.2019 - 27.06.2019 Místo konání München Země DE - Německo Typ akce EUR Jazyk dok. eng - angličtina Země vyd. DE - Německo Klíč. slova laser welding ; hybrid laser-TIG welding ; high-strength low-alloy steel ; fatigue Vědní obor RIV JR - Ostatní strojírenství Obor OECD Mechanical engineering Institucionální podpora UPT-D - RVO:68081731 ; UFM-A - RVO:68081723 Anotace The hybrid laser-tungsten inert gas welding technology was applied to butt weld 3-mm-thick high-strength low-alloy (HSLA) steel sheets. Although the carbon equivalent number of HSLA steel is relatively low, rapid cooling rates accompanying laser welding promote the formation of quenching microstructures in the fusion and heat affected zone of such alloy. The intent of low-current arc addition was to preheat the material to reduce the cooling rate and thus to modify the weld structure. High-cycle fatigue tests were performed to evaluate the effect of heat input on fatigue behavior of S460MC and S700MC laser and hybrid welds. Laser welding led to the dramatic drop in fatigue properties of the samples, especially for S700MC. Preliminary fatigue tests at the 350-MPa level of stress amplitude revealed that the preheating has rather a negative effect on fatigue lifetime of S460MC while increasing arc current increased the fatigue lifetime of S700MC hybrid welds. During detailed high-cycle fatigue tests allowing to construct the S-N curves, a positive effect on fatigue lifetime of S700MC has not been proved. The presence of surface notches probably influences the fatigue behavior of welded samples much stronger than local microstructural changes. Pracoviště Ústav přístrojové techniky Kontakt Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Rok sběru 2020
Počet záznamů: 1