Microstructural evolution and mechanical properties of pure Zn fabricated by selective laser melting

Wang, Chengzhe; Hu, Yunlong; Chen, Zhong; Lan, Cunxiao; Li, Wei; Wang, Xiaojian

doi:10.1016/j.msea.2022.143276

Cited by 22 publications

(3 citation statements)

References 29 publications

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“…In this study, the LPBF-printed Zn achieves superior ductility and high tensile strength compared with the counterparts prepared by conventional processes such as casting [41,[57][58][59][60][61], hot extrusion [42,[62][63][64][65][66][67], and hot rolling [43,62] (figure 14(a)). Among all reported LPBF-printed Zn samples to date [21,23,27,29,[68][69][70][71][72][73][74][75][76][77][78], the printed Zn at the horizontal plane demonstrates the highest mechanical properties with a UTS of 128.7 MPa and a ductility of 12.1%, enabling it as a promising candidate for designing Zn-based implant in biomedical applications. It is worth noting that LPBFprinted Zn generally displays significant mechanical anisotropy.…”

Section: Strengthening Mechanismsmentioning

confidence: 99%

“…Consequently, non-equilibrium solidification microstructures are formed under significantly large subcooling and high grain growth rates, resulting in increased solute solid solubility, much smaller grain size compared with conventionally processed counterparts, and reduced element segregation [20]. For instance, Wang et al [21] observed that the grain size of LPBF-printed pure Zn was approximately 10 µm compared to hundreds of microns for casted Zn. This finding indicates that the mechanical properties of LPBF-printed Zn significantly surpass those of conventionally manufactured counterparts (cast or extruded).…”

Section: Introductionmentioning

confidence: 99%

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Role of heterogenous microstructure and deformation behavior in achieving superior strength-ductility synergy in zinc fabricated via laser powder bed fusion

Dong,

Han,

Zhao

et al. 2024

Int. J. Extrem. Manuf.

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Zinc (Zn) is considered a promising biodegradable metal for implant applications due to its appropriate degradability and favorable osteogenesis properties. In this work, laser powder bed fusion (LPBF) additive manufacturing was employed to fabricate pure Zn with a heterogenous microstructure and exceptional strength-ductility synergy. An optimized processing window of LPBF was established for printing Zn samples with relative densities greater than 99% using a laser power range of 80–90 W and a scanning speed of 900 mm/s. The Zn sample printed with a power of 80 W at a speed of 900 mm/s exhibited a hierarchical heterogenous microstructure consisting of millimeter-scale molten pool boundaries, micrometer-scale bimodal grains, and nanometer-scale pre-existing dislocations, due to rapid cooling rates and significant thermal gradients formed in the molten pools. The printed sample exhibited the highest ductility of ~12.1% among all reported LPBF-printed pure Zn to date with appreciable ultimate tensile strength (~128.7 MPa). Such superior strength-ductility synergy can be attributed to the presence of multiple deformation mechanisms that are primarily governed by heterogeneous deformation-induced hardening resulting from the alternatively arrangement of bimodal Zn grains with pre-existing dislocations. Additionally, continuous strain hardening was facilitated through the interactions between deformation twins, grains and dislocations as strain accumulated, further contributing to the superior strength-ductility synergy. These findings provide valuable insights into the deformation behavior and mechanisms underlying exceptional mechanical properties of LPBF-printed Zn and its alloys for implant applications.

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Section: Strengthening Mechanismsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Role of heterogenous microstructure and deformation behavior in achieving superior strength-ductility synergy in zinc fabricated via laser powder bed fusion

Dong,

Han,

Zhao

et al. 2024

Int. J. Extrem. Manuf.

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show abstract

“…[18] As shown in Figure 1a, the bulk Mo metal delivers the highest yield strength (≈500 MPa) among the metallic elements that have been employed in SSE interfacial modification (i.e., Al: 46 MPa; Mg: 35 MPa, Zn: 85 MPa; Cu: 50 MPa; Ni: 63 MPa; Ag: 57 MPa; Sn: 38 MPa). [19][20][21][22][23][24][25][26] Furthermore, the yield strength of nanocrystalline Mo reaches up to the GPa level owing to the size effect, [25] which is a thousandfold higher than that of bulk Li metal (≈0.8 MPa only), endowing the suppression of Li dendrite growth. More importantly, these Mo nanocrystals remains in the MIS layer during cycling rather than gradually diffusing into Li metal anode.…”

Section: The Rational Design and Properties Of Mis Layermentioning

confidence: 99%

A Lithium Intrusion‐Blocking Interfacial Shield for Wide‐Pressure‐Range Solid‐State Lithium Metal Batteries

Hu,

Yu,

Wang

et al. 2023

Advanced Materials

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Lithium garnets are considered as promising solid–state electrolytes for next–generation solid–state Li metal batteries (SSLBs). However, the Li intrusion driven by external stack pressure triggers premature of Li metal batteries. Herein, for the first time, we report an in situ constructed interfacial shield to efficiently inhibit the pressure–induced Li intrusion in SSLBs. Theoretical modeling and experimental investigations reveal that high–hardness metallic Mo nanocrystals inside the shield effectively suppress Li dendrite growth without alloy hardening–derived interfacial contact deterioration. Meanwhile the electrically insulated Li2S as a shield component considerably promotes interfacial wettability and hinders Li dendrite penetration into the bulk of garnet electrolyte. Interfacial shield–protected Li6.4La3Zr1.4Ta0.6O12 (LLZTO)–based cells exhibit significantly enhanced cyclability without short circuits under conventional pressures of ≈0.2 MPa and even at high pressure of up to 70 MPa; which is the highest endurable stack pressure reported for SSLBs using garnet electrolytes. These key findings are expected to promote the wide–pressure–range applications of SSLBs.This article is protected by copyright. All rights reserved

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Additively Manufactured Medical Implants

Dağ,

Avar

2023

Materials Horizons: From Nature to Nanomaterials

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Microstructural evolution and mechanical properties of pure Zn fabricated by selective laser melting

Cited by 22 publications

References 29 publications

Role of heterogenous microstructure and deformation behavior in achieving superior strength-ductility synergy in zinc fabricated via laser powder bed fusion

Role of heterogenous microstructure and deformation behavior in achieving superior strength-ductility synergy in zinc fabricated via laser powder bed fusion

A Lithium Intrusion‐Blocking Interfacial Shield for Wide‐Pressure‐Range Solid‐State Lithium Metal Batteries

Additively Manufactured Medical Implants

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