The fracture toughness of martensite islands in dual-phase DP800 steel
نویسندگان
چکیده
Abstract In situ microcantilever bending tests were performed on martensite islands in a dual-phase (DP) steel to extract the fracture toughness of at microscale and understand damage initiation during forming DP steels. All microcantilevers produced through FIB milling. The do not exhibit linear elastic brittle fracture; instead, significant ductile tearing is observed. conditional extracted by definition Pippan’s transfer criterion K i = 6.5 ± 0.4 MPa m 1/2 i,2% 10.1 0.3 , respectively. obtained value well-represented strength-toughness trend other ferritic grades. Considering yield stress same island, we found that crack can occur only very large or banded agglomerated structure. Graphic abstract
منابع مشابه
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ژورنال
عنوان ژورنال: Journal of Materials Research
سال: 2021
ISSN: ['0884-1616', '1092-8928', '0884-2914', '1091-8876', '2044-5326']
DOI: https://doi.org/10.1557/s43578-021-00150-4