Effect of Solutionizing Time on Improving the Microstructure and Mechanical Properties of Aged AZ80 Mg Alloy

Yeoh, Mui Kheng; XingHe, Tan; Cheang, P.; Lim, Teik‐Cheng; Kwok, R.

doi:10.1007/s11665-019-04382-8

Cited by 8 publications

(3 citation statements)

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“…This can be attributed to grain growth and reduction in the volume fraction of β-Mg17Al12 phase, as shown in Table 1. Also, another contributing factor could be increased interlamellar spacing, which was studied in a previous work [19]. However, it is noticeable that the YS changed slightly in T4X (102MPa).…”

Section: Solutionizing With Aging (T6 and T6x)mentioning

confidence: 82%

“…However, it is still difficult to achieve a good combination of strength and ductility, which may restrict their usage and application. More recently, several studies have been devoted to the development of better mechanical performance in as-cast AZ80 with different solutionizing times to enhance the dissolu-tion of the eutectic Mg17Al12 phase [18,19]. The findings suggest that the dissolution of β-Mg17Al12 phase is highly time and temperature dependent.…”

Section: Introductionmentioning

confidence: 99%

“…The volume fraction of the β-Mg17Al12 phase decreased with time and temperature. These secondphase particles have been found to affect the mechanical properties of magnesium alloys [16,[18][19][20]. Although the results show significant differences in tensile properties, ductility is still a concern, which seem to be insufficient for high performance industrial applications.…”

Section: Introductionmentioning

confidence: 99%

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INVESTIGATION OF DISTINCTIVE SOLUTIONIZING PROCESS PARAMETERS ON SIGNIFICANTLY INCREASING IN STRENGTH AND DUCTILITY OF As-CAST AZ80 Mg ALLOY

Yeoh¹,

XingHe²,

Kwok

et al. 2020

Acta Metall Slovaca

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A distinctive solutionizing process parameter was developed and performed to significantly enhance strength and ductility of aged AZ80 Mg alloy. The microstructure-processing-properties relationship was studied to help elucidate the mechanism. Microstructure and mechanical properties were studied by using optical microscopy, Field Emission Scanning Electron Microscopy, Transmission Electron Microscopy, X-ray diffraction, hardness and tensile testing. The results show that the solutionization at 380°C/10h followed by 420°C/10h promoted significant dissolution of eutectic Mg17Al12 and intermetallic phases. After standard aging at 200°C/10h, the formation of high-density precipitates Mg17Al12 with more spheroidization precipitates and lesser discontinuous precipitates morphology, which was not observed in conventional heat treatment for aged AZ80 Mg alloy. Fine precipitates Mg17Al12 resulted in a significant increase in ultimate tensile strength (50.3%), yield strength (35%), elongation (106%) and hardness (40%) compared to conventional heat treated cast AZ80 Mg alloy. These properties are comparable to the commonly used aerospace grade cast aluminium alloy A356.

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Section: Solutionizing With Aging (T6 and T6x)mentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%