3-D characterization of incipient spallation response in cylindrical copper under sweeping detonation

Yang, Yang; Chen, Jixiong; Guo, Zhaoliang; Tang, Tiegang; Hu, Haibo; Fu, Yanan

doi:10.1557/jmr.2017.25

Cited by 9 publications

(3 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to select the elongated voids, a filter with sphericity settings between 0 and 0.3 was applied [ 40 , 77 , 78 , 79 ]. The void distribution along the ROI for each built direction is shown in Figure 3 .…”

Section: Methodsmentioning

confidence: 99%

Extended CT Void Analysis in FDM Additive Manufacturing Components

et al. 2020

View full text Add to dashboard Cite

Additive manufacturing (AM) is the term for a number of processes for joining materials to build physical components from a digital 3D model. AM has multiple advantages over other construction techniques, such as freeform, customization, and waste reduction. However, AM components have been evaluated by destructive and non-destructive testing and have shown mechanical issues, such as reduced resistance, anisotropy and voids. The build direction affects the mechanical properties of the built part, including voids of different characteristics. The aim of this work is an extended analysis of void shape by means of X-ray computed tomography (CT) applied to fused deposition modeling (FDM) samples. Furthermore, a relation between the tensile mechanical properties and digital void measurements is established. The results of this work demonstrate that void characteristics such as quantity, size, sphericity and compactness show no obvious variations between the samples. However, the angle between the main void axis and the mechanical load axis α shows a relation for FDM components: when its mean value μ(α) is around 80 (degrees) the yield strength and Young’s modulus are reduced. These results lead to the formulation of a novel criterion that predicts the mechanical behavior of AM components.

show abstract

Section: Methodsmentioning

confidence: 99%

Extended CT Void Analysis in FDM Additive Manufacturing Components

et al. 2020

View full text Add to dashboard Cite

show abstract

“…For spallation, the early researches were focused on the effect of the microstructure of materials in single‐phase alloys, such as grain, grain boundary, and inclusion . For example, Furnish and Chhabildas discovered that the void nucleation position of the tantalum samples was related to the initial grain size of the samples—the samples with a grain size of 20 μm had a wider void distribution area than the samples with a grain size of 40 μm.…”

Section: Introductionmentioning

confidence: 99%

“…The results showed that intermetallic particles initiated microstructural damage during shock loading and reduced spall strength. Similarly, Yang et al took high‐purity oxygen‐free copper as the object of study and discussed the effects of grain boundary type, grain orientation, and grain size on the spallation behavior of high‐purity copper. However, the influence of phase interface on the nucleation and evolution of dynamic damage in multiphase alloys is still unclear.…”

Section: Introductionmentioning

confidence: 99%

Effects of the Phase Interface on Spallation Damage Nucleation and Evolution in Dual‐Phase Steel

Yang

Wang

et al. 2020

steel research int.

Self Cite

View full text Add to dashboard Cite

The dual‐phase steel sample obtained by step quenching (SQ) of AISI 1020 steel is shock loaded using one‐stage light‐gas gun experiments. The free surface particle velocity is measured by Doppler pin system (DPS) during the loading experiment. The effect of phase interface on spallation damage nucleation and evolution in dual‐phase steel is investigated with optical microscopy (OM), nanoindentation, and electron backscatter diffraction (EBSD) techniques. The evolution mechanism of spallation damage in dual‐phase steel is systematically analyzed. The results show voids nucleated within martensite rather than at the martensite/ferrite interface under dynamic loading. The nucleation of voids in martensite was not random, the martensite block boundaries with a great Taylor Factor (TF) mismatch and a large angle to the impact direction were the preferred nucleation positions of the voids. Voids nucleate, grow and further coalesce into microcracks. Most of the microcracks propagate across the phase interface and the propagation direction hardly deflects. Due to the existence of many martensite blocks with high‐angle grain interface boundaries inside the martensite, the resistance of microcracks propagation in martensite is greater than that in ferrite. Furthermore, the size of microcracks is related to the angle between the direction of martensite blocks and shock direction.

show abstract