Influence of microstructure topology on the mechanical properties of powder compacted materials

The quasi‐static crush response of electron‐beam‐melt Ti6Al4V body‐centred‐cubic lattices: The effect of the number of cells, strut diameter and face sheet

“…The specimen deformation in the quasi-static compression tests was further recorded by using a SONY DSC-RX10M2 camera. Inconel 0.033-0.123 0.76 2 [24] Ti-6Al-4V 0.1-0.3 1.1607 2.0833 [25] Ti-6Al-4V 0.05-0.11 0.75 2.17 [26] Ti-6Al-4V 0.4-0.9 1 2.2 [27] Ti-6Al-4V 0.015-0.15 0.1-1 1.5 [28,29] 2…”

Extremely stiff and lightweight auxetic metamaterial designs enabled by asymmetric strut cross-sections

“…when 3ATC lattice is a solid cube). This result implies that the load-bearing efficiency of the rotation-dominated 3ATC structure will not surpass its stretch-dominated counterparts of a simple cubic structure [9,37,38]…”

“…Ever since re-entrant foams with random internal structures were first studied as an auxetic material [19], there has been a proliferation of studies on different negative Poisson's ratio structures, including re-entrant designs [20][21][22], rotating polygons [23,24], double-V structures [25][26][27], and chiral-type geometries [9,[28][29][30]. Regardless of the classification, auxetic structures, in general, display low stiffnesses compared to rigid stretch-dominated lattices [31], as their deformation has to be bending-dominated [21,[32][33][34][35][36] or joint-rotationdominated [9,37,38] in order for the negative Poisson's ratio to be appreciable. However, the quantitative relationship between this trade-off in modulus for negative Poisson's ratio remains unclear for most structures, despite its importance in informing the suitability of auxetic designs for structural applications.…”

Site-specific control of alloy property through binder jet 3D printing

“…6.2, which do not account for complications such as edge effects, Poisson's effect, and a diffuse carbon profile at the strip edges. Moreover, the higher modulus of the isostress sample compared to the isostrain sample, in contrast to the analytical predictions, was likely to be due to the higher sintered density for the isostress sample [138]. It is also possible to predict the failure stress and strain of the samples through a simple analysis.…”

“…For the SPS samples, the high carbon steel samples exhibited a higher elastic modulus (167.2 ± 28.0 GPa) compared to the low carbon steel samples (103.0 ± 22.0 GPa). The higher elastic modulus in the high carbon steel can be attributed to the higher relative density since (i) carbon content is known to have little effect on Young's modulus of steel and (ii) the modulus of powder compacted materials is highly sensitive to small amounts of porosity [138]. Pressurelessly sintered samples, with a similar relative density of 90.9% and similar moduli for the low and high carbon sample (60.3 ± 3.8 GPa for low carbon steel samples vs. 64.7 ± 5.2 GPa for high carbon steel samples), support this premise.…”