Počet záznamů: 1
Profiles of persistent slip markings and internal structure of underlying persistent slip bands
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SYSNO ASEP 0480348 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Profiles of persistent slip markings and internal structure of underlying persistent slip bands Tvůrce(i) Polák, Jaroslav (UFM-A) RID, ORCID
Mazánová, Veronika (UFM-A)
Heczko, Milan (UFM-A) ORCID
Kuběna, Ivo (UFM-A) RID, ORCID
Man, Jiří (UFM-A) RID, ORCIDCelkový počet autorů 5 Zdroj.dok. Fatigue and Fracture of Engineering Materials and Structures - ISSN 8756-758X
Roč. 40, č. 7 (2017), s. 1101-1116Poč.str. 16 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova copper ; dislocation structure ; extrusions ; fatigue crack initiation ; intrusions ; stainless steel Vědní obor RIV JL - Únava materiálu a lomová mechanika Obor OECD Audio engineering, reliability analysis CEP ED1.1.00/02.0068 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy LM2015069 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy GA13-23652S GA ČR - Grantová agentura ČR Institucionální podpora UFM-A - RVO:68081723 UT WOS 000402791200007 EID SCOPUS 85010607480 DOI https://doi.org/10.1111/ffe.12567 Anotace Focused ion beam sections and lamellae for transmission electron microscopy were prepared from fatigued specimens of polycrystalline copper and austenitic Sanicro 25 steel. The profiles of persistent slip markings developed on the surface were observed and documented simultaneously with the underlying dislocation structure. In copper fatigued at room temperature and close to liquid nitrogen temperature, persistent slip markings consisting of pronounced extrusions and parallel intrusions appeared at locations where persistent slip bands having the ladder-like dislocation structure egress on the surface. Stage I cracks initiated from the tip of the intrusions. In Sanicro 25 steel, more planar character of the dislocation structure led to thin extrusions and intrusions and several stage I cracks running parallel to the primary slip plane. Exceptionally, ladder-like structure and generally alternating dislocation-rich and dislocation-poor volumes were observed in the PSBs. Dislocations bands of secondary slip systems in the matrix disappeared on intersections with PSBs. Experimental findings were compared with predictions of recent physically based models of fatigue crack initiation. Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2018
Počet záznamů: 1