Quantitative assessment of second phase particles characteristics and its role on the deformation response of a Mg-8Al-0.5Zn alloy

Sarvesha, R.; Alam, W.; Gokhale, Aditya; Guruprasad, Thimmappa Shetty; Bhagavath, S.; Karagadde, Shyamprasad; Jain, Jayant; Singh, Sudhanshu S.

doi:10.1016/j.msea.2019.05.052

Cited by 39 publications

(9 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, those micro-cracks further formed micro-voids and nucleated around second phases along grain boundaries. Due to the spatial arrangement of the second phases along grain boundaries, the micro-void stopped growing soon after their formation [ 35 , 36 ]. At this stage, triaxiality effects began to manifest as shown in the 3D reconstruction of the microstructure of the JQ alloy in Fig.…”

Section: Discussionmentioning

confidence: 99%

In vivo urinary compatibility of Mg-Sr-Ag alloy in swine model

Tie

Hort

Chen

et al. 2022

Bioactive Materials

View full text Add to dashboard Cite

A biodegradable metallic ureteral stent with suitable mechanical properties and antibacterial activity remains a challenge. Here we reveal the scientific significance of a biodegradable Mg-Sr-Ag alloy with a favorable combination of balanced mechanical properties, adjustable indwelling time in urinary tract and evident antibacterial activity via in vivo experiments in a swine model. Attributed to the rheo-solidification process, equiaxial microstructure and significantly refined grains (average grain size: 27.1 μm) were achieved. Mg 17 Sr 2 and Mg 4 Ag were found as the primary precipitates in the matrix, due to which the alloy obtained ca. 111% increase in ultimate tensile strength in comparison to pure magnesium. Both the in vitro and in vivo results demonstrated the satisfactory biocompatibility of the alloy. Histological evaluation and bioindicators analysis suggested that there was no tissue damage, inflammation and lesions in the urinary system caused by the degradation process. The stent also improved the post-operative bladder functions viewed from the urodynamic results. Our findings highlight the potential of this alloy as antibacterial biodegradable urinary implant material.

show abstract

Section: Discussionmentioning

confidence: 99%

In vivo urinary compatibility of Mg-Sr-Ag alloy in swine model

Tie

Hort

Chen

et al. 2022

Bioactive Materials

View full text Add to dashboard Cite

show abstract

“…The strength values of the HTD sample were consequently higher than those of the MTD and CTD samples. However, many coarse second-phase particles were retained in the sample following heat treatment, providing nucleation sites for dimples during tensile tests, and significantly decreasing its plasticity [ 25 ]. The existence of many particles on the fractured surface confirmed the above analysis ( Figure 11 c).…”

Section: Discussionmentioning

confidence: 99%

Effects of Deformation at High, Medium, and Cryogenic Temperatures on the Microstructures and Mechanical Properties of Al-Zn-Mg-Cu Alloys

Zhang

Huang

et al. 2022

Materials

View full text Add to dashboard Cite

Thermomechanical treatment is an effective way to refine the coarse microstructures of aluminum alloys. In this work, multiaxial forging deformation at high, medium, and cryogenic temperatures (i.e., 450, 250, and −180 °C, respectively) was performed on 7085 Al–Zn–Mg–Cu alloys, and its effect on the microstructure evolution and mechanical properties during the subsequent T6 heat treatment process was studied. The results revealed that the coarse particles were broken into finer particles when deformed at cryogenic temperatures, promoting the dissolution of the material after solid solution treatment. Dynamic recrystallization occurred when deformed at 450 °C; however, more dislocations and substructures were found in the samples deformed at 250 and −180 °C, causing static recrystallization after solid solution treatment. The cryogenic deformed sample exhibited a more intense and homogeneous precipitation phase distribution. The strength of the sample deformed at high temperature was high, but its elongation was low, while the strength of the sample deformed at medium temperature was low. The microstructure refinement of the cryogenic deformed sample led to high comprehensive mechanical properties, with an ultimate tensile strength of 535 MPa, a yield strength of 506 MPa, and a fracture elongation of 11.1%.

show abstract

“…In order to improve the plasticity of magnesium alloys, the process of extrusion and aging treatment is usually carried out which is accompanied with the precipitation of second particles [4]. Meanwhile, it has been reported that the crack usually initiates from the surface of second particles during failure [5]. Therefore, the second particles play a double-edged effect in magnesium alloys.…”

Section: Introductionmentioning

confidence: 99%

Interaction effect of second particles on the stress concentration in ZK60 magnesium alloy

Tian

Liu

Hou

et al. 2023

Materialwissenschaft Werkst

View full text Add to dashboard Cite

Second particles play a crucial role in influencing the performance of magnesium alloys. A previous work showed that during the fracture initiation process a competitive relationship exists between micron MgZn2 particles and submicron Mg4Zn7 particles of ZK60 magnesium alloy. Especially, some of the MgZn2 particles were found to be gathered in pairs, which resulted in the interaction effect. In this work, three‐dimensional MgZn2 particles were characterized in terms of size, morphology, and distribution using computed tomography technology. Based on the visualization and quantification results of MgZn2 particles, the typical structural models were established. The relationship between stress concentration and shape ratio induced by a single particle was investigated using finite element computations. Furthermore, empirical equations were proposed to quantify the interaction effect induced by two adjacent particles. The validity of the equations was verified by models based on real particle. Comparing the stress concentration between micron MgZn2 particles and submicron Mg4Zn7 particles, the fracture initiation was confirmed to be caused by Mg4Zn7 particles considering the interaction effect of micron particles. The obtained quantitative information would be useful for understanding the crack initiation of engineering materials.

show abstract

Quantitative assessment of second phase particles characteristics and its role on the deformation response of a Mg-8Al-0.5Zn alloy

Cited by 39 publications

References 32 publications

In vivo urinary compatibility of Mg-Sr-Ag alloy in swine model

In vivo urinary compatibility of Mg-Sr-Ag alloy in swine model

Effects of Deformation at High, Medium, and Cryogenic Temperatures on the Microstructures and Mechanical Properties of Al-Zn-Mg-Cu Alloys

Interaction effect of second particles on the stress concentration in ZK60 magnesium alloy

Contact Info

Product

Resources

About