Sep 2026· Fatigue & Fracture of Engineering Materials & Structures· 0 citations· 41 references
Abstract
This study investigates damage evolution in a high‐carbon steel containing ferrite, retained cementite (RC), and precipitated cementite (PC) after inter‐critical quenching and tempering at 540°C and 600°C. In situ tensile testing and fracture‐section analysis identify ferrite/cementite interfacial‐debonding voids (IDV
F/C
) and ferrite‐cracking voids (FCVs) as the predominant damage mechanisms. Finite element simulations show that IDV
F/C
and FCV are driven by interfacial stress concentration and localized plastic strain in ferrite, respectively. Cohesive‐zone simulations reveal that the critical strain for interfacial damage decreases exponentially with cementite diameter, indicating a critical diameter below which void nucleation is suppressed. This critical diameter is approximately 200 nm in T600. The higher‐strength T540 steel is more susceptible to interfacial damage than T600. Fracture proceeds through hierarchical void coalescence. Nanoscale dimples dominate the fracture surface and form by coalescence of voids nucleated at nanoscale cementite and within ferrite, whereas microscale RC contributes little.
Premature failure of critical energy infrastructure caused by creep damage, threatens productivity and safety, emphasizing the need for robust methods to monitor and predict material performance. Creep damage nucleation in metals is driven by nano- and micro-structural features, but linking these early evolutions t...
E. Galliopoulou, Si-Qi He, M. Salvini et al.· npj Materials Degradation· 1 citation
In recent years, the continuous casting production of high‐Mn cryogenic steel has attracted considerable attention. However, this process still faces problems such as surface cracks and even breakout, which are related to crack sensitivity of this steel. To investigate crack sensitivity of high‐Mn cryogenic steel slab...
Yin Cui, Chang-Gui Cheng, Yang Li et al.· Steel Research International· 0 citations
Short fatigue cracks (SFCs) propagation in high‐strength alloy structural steel 34CrNi3Mo was investigated using in situ scanning electron microscopy and electron backscatter diffraction. Prefabricated notches with three initial nominal stress intensity factor range (Δ
K
) were fabricated via focused ion beam. SF...
Yi-Fan Gao, Wan-Wei Fu, Zhen-Qiang Wang et al.· Fatigue & Fracture of En...· 0 citations
To suppress the damage accumulation and reduce the wire breakage rate of high‐carbon wire during the drawing process, this study investigates the influence of initial microstructure, specifically pearlitic lamellar morphology and inclusion characteristics, on the damage evolution during the cold drawing of LX82A high‐c...
Kui-Xie Shen, Yin-Fei Ju, Li-Chu Zhou et al.· Steel Research International· 0 citations
This study investigates the effect of laser shock peening (LSP) on the stress corrosion cracking (SCC) resistance of as‐cast and T6‐treated AA7075 alloys. Microstructural evolution was characterized using CLSM, TEM, and SEM, while residual stress was measured via X‐ray diffraction. SCC performance was evaluated throu...
Lei Guan, Ling-Chao Liao, Xiao-Ying Xi et al.· Materials and Corrosion· 0 citations
The susceptibility of high-Al ferritic steels to thermal cracking and microstructural coarsening during fusion welding restricts their practical implementation. To address this challenge, high-quality joints of Fe–10Al alloy were successfully fabricated by friction stir welding (FSW) under ultra-low rotation (80 r/min)...
Jun-Qi Chen, Takuya Miura, K. Ushioda et al.· International Journal of Min...· 0 citations
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