Influence of Annealing Microstructure on the Low-cycle Fatigue Properties and Fatigue Microstructure of a Fe–15Mn–10Cr–8Ni–4Si Seismic Damping Alloy
نویسندگان
چکیده
We investigate the effects of annealing microstructure on low-cycle fatigue (LCF) life (Nf), cyclic stress behaviour and a Fe–15Mn–10Cr–8Ni–4Si alloy that exhibits deformation-induced transformation austenite (γ-phase) into ε-martensite (ε-phase). The rolled at 800°C was annealed 600°C, 700°C, 900°C to vary grain size, fraction recrystallised grains texture intensity. Fully reversed axial strain-controlled LCF tests were conducted total strain amplitudes, Δεt/2, ranging from 0.007 0.02. showed higher Nf than common steels ferrous high-Mn alloys in this range. This type found impact Nf, ε-martensitic (ε-MT) studied alloy. fully weakly textured formed T ≥ facilitated uniform development under deformation led an increased Nf. partially austenite-containing substructure with high dislocation density ≤ 700°C suppressed ε-MT, retarded reversible motions un-recrystallised regions moderately decreased Moreover, ε-MT observed be less sensitive variations size.
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ژورنال
عنوان ژورنال: Isij International
سال: 2022
ISSN: ['0915-1559', '1347-5460']
DOI: https://doi.org/10.2355/isijinternational.isijint-2021-211