The mechanisms of grain growth of Mg alloys: A review

Chen, Qinghua; Chen, Ruinan; Su, Jian; He, Qingsong; Tan, Bin; Xu, Chao; Huang, Xu; Dai, Qingwei; Lü, Jian

doi:10.1016/j.jma.2022.09.001

Cited by 72 publications

(7 citation statements)

References 122 publications

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“…Figure 4 shows the ultimate tensile strength, hardness, and % elongation results for all developed alloys. As per the conventional Hall-Petch relationship, which is based on the dislocation accumulation theory, strength increases as grain size decreases [30,31]. As discussed in Section 3.1, the presence of nickel and manganese refine the grains of pure magnesium.…”

Section: Mechanical Propertiesmentioning

confidence: 92%

Effect of Mn on microstructure, mechanical properties, and corrosion behaviour of Mg-Ni alloys

Patel

Rao

2022

Eng. Res. Express

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Previous research on Mg-Ni alloys focused on the mechanical characteristics and damping behaviour in the presence of Zn and rare earth elements. There has not been much research on the Mg-Ni-Mn alloy’s microstructure, mechanical properties, and corrosion behaviour. The present research work fulfils this gap by concentrating on the microstructure, mechanical and corrosion characteristics of Mg-Ni-Mn alloys. Here, different Mg-Ni-Mn alloys were developed by varying the nickel and manganese content. The microstructure of the developed alloys was studied using optical microscope and scanning electron microscope. Ultimate tensile strength and micro hardness of all alloys were performed on tensometer (room temperature), and Vickers hardness tester respectively. The corrosion rate of Mg-Ni and Mg-Ni-Mn alloys was measured at 3.5 wt. % NaCl solution by immersion test. The result shows that the nickel and manganese presence refine the grain size of magnesium. XRD analysis confirmed the presence of α-Mg and Mg2Ni phases in Mg-Ni alloys. Along with these phases, the Mn phase was observed in Mg-Ni-Mn alloys. Mechanical properties such as ultimate tensile strength and hardness of pure magnesium were increased in the presence of Ni and Mn. However, the presence of manganese in Mg-Ni alloy shows an adverse effect on corrosion behaviour. The corrosion rate of the Mg-Ni alloy was accelerated in the presence of manganese.

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Section: Mechanical Propertiesmentioning

confidence: 92%

Effect of Mn on microstructure, mechanical properties, and corrosion behaviour of Mg-Ni alloys

Patel

Rao

2022

Eng. Res. Express

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“…It was believed that the precipitation phase acted as a nucleation site for new grains during recrystallization [45]. With the increasing of aging temperature, the grain size tended to enlarge further, which was due to the partial dissolution of Mg 24 Y 5 intermetallic and re-precipitation of the β 1 phase [46,47].…”

Section: Microstructure Observations Of Post-heat Treatmentmentioning

confidence: 99%

Influence of heat treatment on microstructure, mechanical and corrosion behavior of WE43 alloy fabricated by laser-beam powder bed fusion

Ling,

Li,

Zhang

et al. 2023

Int. J. Extrem. Manuf.

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Magnesium (Mg) alloys are considered to be a new generation of revolutionary medical metals. Laser-beam powder bed fusion (PBF-LB) is suitable for fabricating metal implant with personalized and complicated structure. However, the as-built part usually exhibits undesirable microstructure and unsatisfied performance. In this work, WE43 parts were firstly fabricated by PBF-LB and then subjected to heat treatment. Although high densification rate of 99.91% was achieved using suitable processes, the as-built parts exhibited anisotropic and layered microstructure with heterogeneously precipitated Nd-rich intermetallic. After heat treatment, fine and nano-scaled Mg24Y5 particles were precipitated. Meanwhile, the α-Mg grains undergone recrystallization and turned coarsened slightly, which effectively weakened the texture intensity and reduced the anisotropy. As a consequence, the YS and UTS were significantly improved to 250.2 ± 3.5 MPa and 312 ± 3.7 MPa, respectively, while the elongation still maintained at high level of 15.2%. Furthermore, the homogenized microstructure reduced the tendency of localized corrosion, and promoted the development of uniform passivation film. Thus, the degradation rate of WE43 parts was reduced by an order of magnitude. Besides, in-vitro cell experiments proved its favorable biocompatibility.

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“…If the temperature is too low (<225 • C), it will lead to serious surface cracks and edge cracks [1]. If the temperature is too high, it will induce coarse grains and reduce the mechanical properties and surface quality of rolled Mg alloy foils [2]. Therefore, it is very important to ensure the stability of rolling temperature and the uniformity of temperature distribution to realize the continuous production and production safety of magnesium alloy rolling.…”

Section: Introductionmentioning

confidence: 99%

The Coupled Temperature Field Model of Difficult-to-Deform Mg Alloy Foil High-Efficiency Electro-Rolling and Experimental Study

Liu,

Yang,

Shan

et al. 2024

Metals

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In response to the challenging difficult-to-deform of magnesium foils, a high-efficiency and high-precision electro-rolling temperature field coupled model is established. This model is designed to simulate the non-annealing electric rolling (NAER) process of Mg foils under conditions of high current density, rapid temperature rise rates, and large temperature gradients. Firstly, a coupled temperature field difference model for the guide roller, roll, and Mg foil is established, based on the equipment for NAER and the electrification conditions. The Joule heat, distortion heat, and friction heat in the electric rolling process were precisely considered. Secondly, considering the peculiarity of the heat source and the heat transfer mechanism during NAER, the influence of the dynamic boundary conditions on the instantaneous temperature of the Mg foil was analyzed, which was closer to the actual situation. The experimental results show that the original model can accurately simulate the transient temperature change in Mg foils during NAER, and the error between the predicted value and the measured value is within 7.1%. According to the calculation of the model, the microstructure of completely recrystallized magnesium foil with a grain size of 4.61 μm and a texture strength of 11.3 can be obtained at an inlet temperature of 250 °C.

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The mechanisms of grain growth of Mg alloys: A review

Cited by 72 publications

References 122 publications

Effect of Mn on microstructure, mechanical properties, and corrosion behaviour of Mg-Ni alloys

Effect of Mn on microstructure, mechanical properties, and corrosion behaviour of Mg-Ni alloys

Influence of heat treatment on microstructure, mechanical and corrosion behavior of WE43 alloy fabricated by laser-beam powder bed fusion

The Coupled Temperature Field Model of Difficult-to-Deform Mg Alloy Foil High-Efficiency Electro-Rolling and Experimental Study

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