Peritectic-eutectic transformation of intermetallic in Zn alloy: Effects of Mn on the microstructure, strength and ductility

Shuai, Cijun; Zhong, Shiwei; Dong, Zhi; He, Chongxian; Shuai, Yang; Yang, Wenjing; Peng, Shuping

doi:10.1016/j.matchar.2022.112054

Cited by 15 publications

(7 citation statements)

References 59 publications

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“…Disorder of the semi‐coherent interface can be alleviated by fewer periodically edge‐type misfit dislocations, 30 which makes the interface reach a stable state. It helps to reduce the interface energy, decrease the intergranular fracture ratio, and obtain a bonding strong interface, 32 which explains the excellent properties of eutectic composites.…”

Section: Resultsmentioning

confidence: 99%

Mechanical properties of B₄C–CrB₂ binary eutectic composites prepared by arc‐melting

Jia

et al. 2023

Int J Applied Ceramic Tech

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B 4 C-CrB 2 composites were prepared by arc-melting using B 4 C and CrB 2 powders as raw materials. The eutectic composition of B 4 C-CrB 2 system was 30B 4 C-70CrB 2 (mol%) with a labyrinth-like irregularly layered eutectic microstructure, composed of B 4 C phase about 1-2 μm in thickness dispersing in CrB 2 matrix, much smaller than raw powders. The interface of the eutectic composite was well bonded, and there were edge dislocations at the interface to alleviate the interface mismatch. The eutectic temperature of B 4 C-CrB 2 composites was approximately 2200 K. At the eutectic composition, the B 4 C-CrB 2 composites showed the maximum Vickers hardness (24.6 GPa) and fracture toughness (4.3 MPa m 1/2 ) at room temperature.

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Section: Resultsmentioning

confidence: 99%

Mechanical properties of B₄C–CrB₂ binary eutectic composites prepared by arc‐melting

Jia

et al. 2023

Int J Applied Ceramic Tech

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“…The preferential precipitation of Mg 2 Zn 11 at the intergranular or grain boundary hindered the growth of dendrites, thereby refining the microstructure of Zn-Mn-Mg alloys [37]. Guo, Zhu, and Shuai et al introduced a mechanism for the grain refinement of the second phase during the deformation of zinc alloys [17,23,35]. Considering the strain incompatibility between the second phase and the grains, the primary way it shows up is in the pinning action on the grain boundary, which influences recrystallization and causes the development of low angle grain boundary, resulting in grain refinement [31].…”

Section: Discussionmentioning

confidence: 99%

“…However, when the magnesium content reached 0.5 wt.%, the elongation of the alloy decreased by less than 20%. This was because of the brittle fracture and transgranular fracture caused by the deformation of the surrounding matrix caused by the separation of Mg 2 Zn 11 particles from the metal matrix [34,35].…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Effect of Mg Contents on the Microstructure, Mechanical Properties and Cytocompatibility of Degradable Zn-0.5Mn-xMg Alloy

Yang

et al. 2023

JFB

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The effect of magnesium (Mg) content on the microstructure, mechanical properties, and cytocompatibility of degradable Zn-0.5Mn-xMg (x = 0.05 wt%, 0.2 wt%, 0.5 wt%) alloys was investigated. The microstructure, corrosion products, mechanical properties, and corrosion properties of the three alloys were then thoroughly characterized by scanning electron microscopy (SEM), electron back-scattered diffraction (EBSD), and other methods. According to the findings, the grain size of matrix was refined by the addition of Mg, while the size and quantity of Mg2Zn11 phase was increased. The Mg content could significantly improve the ultimate tensile strength (UTS) of the alloy. Compared with the Zn-0.5Mn alloy, the UTS of Zn-0.5Mn-xMg alloy was increased significantly. Zn-0.5Mn-0.5Mg exhibited the highest UTS (369.6 MPa). The strength of the alloy was influenced by the average grain size, the solid solubility of Mg, and the quantity of Mg2Zn11 phase. The increase in the quantity and size of Mg2Zn11 phase was the main reason for the transition from ductile fracture to cleavage fracture. Moreover, Zn-0.5Mn-0.2Mg alloy showed the best cytocompatibility to L-929 cells.

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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%

“…Meanwhile, the observed bimodal grain structure facilitates further exploration of the GBS phenomenon. By applying the Hall-Petch relationship, ∆σ GBS can be calculated as [77]:…”

Section: Strengthening Mechanismsmentioning

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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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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Peritectic-eutectic transformation of intermetallic in Zn alloy: Effects of Mn on the microstructure, strength and ductility

Cited by 15 publications

References 59 publications

Mechanical properties of B₄C–CrB₂ binary eutectic composites prepared by arc‐melting

Mechanical properties of B₄C–CrB₂ binary eutectic composites prepared by arc‐melting

Effect of Mg Contents on the Microstructure, Mechanical Properties and Cytocompatibility of Degradable Zn-0.5Mn-xMg Alloy

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

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Peritectic-eutectic transformation of intermetallic in Zn alloy: Effects of Mn on the microstructure, strength and ductility

Cited by 15 publications

References 59 publications

Mechanical properties of B4C–CrB2 binary eutectic composites prepared by arc‐melting

Mechanical properties of B4C–CrB2 binary eutectic composites prepared by arc‐melting

Effect of Mg Contents on the Microstructure, Mechanical Properties and Cytocompatibility of Degradable Zn-0.5Mn-xMg Alloy

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

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Mechanical properties of B₄C–CrB₂ binary eutectic composites prepared by arc‐melting

Mechanical properties of B₄C–CrB₂ binary eutectic composites prepared by arc‐melting