Effect of solution heat treatment and hot extrusion on in vitro corrosion behavior of Mg−2Y−1Zn−0.4Zr−0.3Sr alloys as a potential biodegradable material

Self Cite

Biodegradable Zn-0.45Li alloys with high strength and ductility were successfully fabricated by hot extrusion and multi-pass drawing to obtain ultrafine-grained microstructures with a secondary phase of fine LiZn 4 participates. The mechanical properties, degradation behavior and cytocompatibility of the alloys were subsequently investigated. Results showed that grain refinement could be achieved in the alloys after hot extrusion and multi-pass drawing. The yield strength, ultimate tensile strength, and elongation to failure of the ultrafine-grained Zn-0.45Li alloys reached 416 MPa, 567 MPa and 55.4 %, respectively. Enhancements in both strength and elongation could be attributed to interactions between LiZn 4 and matrix dislocations, the pinning effect of LiZn 4 on grain boundaries, and grain refinement. Immersion tests and MTT cytotoxicity assay indicated that the Zn-0.45Li alloys have a corrosion rate and cytocompatibility similar to the values reported for biomedical implants.

Section: Methodsmentioning

confidence: 99%

Ultrafine‐grained Zn‐0.45Li alloy with enhanced mechanical property, degradation behavior and cytocompatibility prepared by hot extrusion and multi‐pass drawing

Deng

Guo

et al. 2021

Self Cite

“…This makes them competitive for applications in light‐weight transportation industries, to manufacture aerospace structural parts, electronic instruments, and biomedical devices [1–4]. However, due to their poor wear and corrosion performance, the range of applications is limited [5–7]. ZE41 alloy contains zinc, rare earth elements (cerium, lanthanum, yttrium, neodymium, etc.…”

Section: Introductionmentioning

confidence: 99%

“…and corrosion performance, the range of applications is limited [5][6][7]. ZE41 alloy contains zinc, rare earth elements (cerium, lanthanum, yttrium, neodymium, etc.…”

mentioning

confidence: 99%

Temperature‐dependent wear characteristics of ZE41 magnesium alloy under air and inert environments

Baral,

Thawre,

Sunil

et al. 2023

Dry sliding wear behaviour of ZE41 magnesium alloy was evaluated under the air and argon environment at room temperature, 125 °C, and 250 °C. The coefficient of friction was increased with increasing the test temperature. At room temperature and 125 °C, the friction coefficient was reduced in the argon environment. However, at 250 °C, the friction coefficient in the argon environment was measured as higher compared to that of the tests conducted in the air environment. The wear rate increased with the increasing temperature. However, a lower wear rate was observed in the case of argon atmosphere than in air for all the test temperatures. Abrasion and delamination were dominant wear mechanisms at room temperature and 125 °C, whereas at 250 °C, thermal softening and shearing were found to be dominant. Furthermore, oxidation wear was observed as the prominent mechanism in the air environment.

“…Hence, the degradation behavior is closely related to the phase volume fraction (α-magnesium + Ca 2 Mg 6 Zn 3 + Mg 51 Ca 20 ) [17]. The addition of calcium and man-ganese can refine the microstructure and improve the corrosion properties and they are both trace nutrients elements in human body [18,19]. Manganese was beneficial improving the corrosion resistance of Mg-4Zn-0.5Ca alloys [20].…”

Section: Introductionmentioning

confidence: 99%

Corrosion behavior of as‐cast magnesium‐4 % zinc alloys in simulated body fluid solution: the influence of minor calcium and manganese addition

Wang

et al. 2022

Biodegradable magnesium alloys have been extensively investigated for medical applications. In order to explore magnesiumg alloys with good degradable resistance, the effects of minor amounts of calcium and manganese elements on the corrosion behaviors of newly designed as‐cast degradable Mg‐4Zn‐xMn‐xCa alloys have been investigated systematically in this study. The microstructural evolution of various magnesium alloys are measured by optical microscopy, x‐ray diffraction, and scanning electronic microscopy. The corrosion properties are studied through immersion tests and electrochemical measurements. The results show that the grains are refined and the distribution of the intermetallic Mg‐4Zn‐xMn‐xCa alloys is rearranged by adding calcium and manganese elements. The lowest corrosion rate of 3.79 mm/y is achieved on the as‐cast Mg‐4Zn alloy with 0.2 wt.% calcium and 1 wt.% manganese addition. Besides, the corrosion potential (Ecorr) shifted to −1.546 VSCE with the addition of 0.2 wt.% calcium and 1 wt.% manganese. This is because the grain size refinement and the formation of Mg2Ca and Ca2Mg6Zn3 phases. The as‐cast Mg‐4Zn‐1Mn‐0.2Ca alloy can be considered an ideal material for biodegradable implant material application.