Impact tensile cracking behavior of oxide scale in Q235 strip iron

Abstract

Abstract. Scanning electron microscopy (SEM) is used to observe the fracture surface morphology of Q235 steel. The cracking law/crack rule principle of strip surface under tension is studied via universal tensile testing machine. The results show that the thickness of the scale is relatively uniform, about 10 μm, and the structure is dense and well attached to the matrix. Tensile experiments show that as the strain increases, the cracks increase slowly in the initial stage, rapidly in the middle period, and slowly in the final period. When the strain exceeds 0.15%, the cracks are difficult to increase. In order to avoid direct erosion of the abrasive on the substrate, a reasonable range of tension setting should be 0.15%-0.18% in the pretreatment process without acid descaling.

Impact Dynamic Response of Spherical Net Shells: Finite Element-Based Computational Analysis Investigating the Influence of Dynamic Constitutive Models

“…(3) This paper mainly considered the ramifications of the monomeric high-speed impact on different materials, with the comparative analysis of the impact dynamic response of different materials, specifically focusing on the Kiewitt spherical net shell [31]. Through large-scale parametric analysis, we successfully obtained the impact failure mode distributions [32,33] of certain types of structural steel, including Q235B [34], Q355B, Q460D [35], as well as aluminum alloy 6061-T6 [36,37]. Furthermore, we summarized the change patterns of the failure modes of different structural steel [38] and compared the impact resistance of Q235B steel and 6061-T6 aluminum alloy, which eventually revealed the mechanism of impact dynamic response with typical examples, and provided a reference for the study of the shell structure under impacts.…”

Effect of oxide scale structure on shot-blasting of hot-rolled strip steel

“…We have studied the effect of shot blasting speed on the descaling effect, and the results show with the increase of the projectile velocity, the damage area of the oxide scale is increased, and the damage area is composed of the direct destruction area and the indirect failure area. (Wang et al, 2017a(Wang et al, , 2017b(Wang et al, , 2018.…”