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Bingwei Li's research works Harbin Institute of

This paper investigated the crack formation and suppression mechanism in laser-metal active gas (MAG) hybrid welded 30CrMnSiA joints. The cracks were usually found in the weld crater that was Effect of doping SiC particles on cracks and pores of Al 2 Mar 25, 2019 · In this paper, method of doping SiCp is used to suppress crack and pore defects of Al 2 O 3 ZrO 2 eutectic ceramic samples fabricated by directed laser deposition. The effect of SiCp on crack and pore suppression and their mechanisms are studied. The main conclusions are as follows:1.

Fatigue Life and Stress Retro Estimation of 30CrMnSiA in

Mechanism of the crack formation and suppression in laser-MAG hybrid welded 30CrMnSiA joints[J]. Journal of Materials Processing Tech, 2017,239. DOI:10.1016/j.jmatprotec.2016.08.033 Formation and Elimination Mechanism of Lack of Fusion and

  • Statistics of LOF Defects in Different Deposition Layers of SamplesConditions For The Formation of LOF DefectsFormation Mechanism of LOF DefectsCrack Defects DistributionCrack Formation MechanismMicrostructure and Mechanical PropertiesDLD process is a three-dimensional stress field, which is caused by the three-direction thermal strain. The area of the boundary between the deposited layer and the substrate is identical, while the thermal expansion coefficient is different, resulting in large thermal stress at the interface between the deposited layer and the substrate. The calculation of thermal stress is shown in Eq 4 (Ref 36). where E is the Youngs modulus, is the Poissons ratio, is the difference between the thermal expansion coefficieOSA X-ray phase contrast observation of solidification
    • IntroductionExperimental ProceduresResults and DiscussionSummaryFusion manufacturing, e.g., casting [1,2], additive manufacturing [3] and welding [48], plays a significant role in the production of metal part. The solidification process of molten metal will determine the microstructure [9,10], residual stress [11], thus final performance of the product [12]. Crack was one of the most serious defects in fusion manufacturing, which was produced under the combined action of stress and microstructure [1315]. Finally, obtaining a better understanding of solidification and crack foCrack-free femtosecond laser processing of lithium niobate Feb 09, 2021 · Femtosecond lasers (fs-lasers) offer a powerful and advantageous tool for fabricating a very large variety of materials. When processing transparent dielectrics, structural defects, such as cracks and broken edges, are always present, thus restricting the precision of fs-laser processing. In this paper, the formation and suppression mechanism of fs-laser induced structural defects are Fracture failure analysis on swivel nut of 30CrMnSiA steel Feb 01, 2021 · Lei Z., Li B., Ni L., Yang Y., Yang S. and Hu P. 2017 Mechanism of the crack formation and suppression in laser-MAG hybrid welded 30CrMnSiA joints Journal of Materials Processing Technology 239 187-194. Google Scholar

      Selective crack suppression during deformation in metal

      Oct 01, 2019 · Here, we find that electron beam irradiation prompts a crack suppression phenomenon in a copper (Cu) thin film on a polyimide substrate, allowing for the control of crack formation The diffraction mechanism behind crack formation upon The formation of beam-orthogonal optical cracks upon exposure of a glass to quasi-stationary laser radiation is studied. It is found that cracks may be the result of nonstationary electrostriction tensions in the medium caused by the radiation scattered by thermal inhomogeneities which develop under the breakdown. Characteristic sizes and spatial features of this type of damage are interpreted Yuhe YANG National University of Singapore, Singapore This paper investigated the crack formation and suppression mechanism in laser-metal active gas (MAG) hybrid welded 30CrMnSiA joints. The cracks were usually found in the weld crater that was

      Yuhe Yang - Google Scholar

      Mechanism of the crack formation and suppression in laser-MAG hybrid welded 30CrMnSiA joints. Z Lei, B Li, L Ni, Y Yang, S Yang, P Hu. Journal of Materials Processing Technology 239, 187-194, 2017. 12:2017:Permeable superelastic liquid-metal fibre mat Defect Formation Mechanisms in Selective Laser Melting:A Apr 21, 2017 · Defect formation is a common problem in selective laser melting (SLM). This paper provides a review of defect formation mechanisms in SLM. It summarizes the recent research outcomes on defect findings and classification, analyzes formation mechanisms of the common defects, such as porosities, incomplete fusion holes, and cracks. The paper discusses the effect of the process