Microscopic failure modes of hpdc AZ91HP magnesium alloy under monotonic loading

Prakash, D.G. Leo; Regener, D.; Vorster, Willem J.J.

doi:10.1016/j.msea.2007.11.011

Cited by 19 publications

(21 citation statements)

References 19 publications

(21 reference statements)

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“…Ductility was reduced with an increased fraction of Mg 17 Al 12 up to approximately 9%, after which a further ductility decrease was inconclusive. 4 The hardening rate in the tensile tests appeared to be higher for smaller SDAS while no such relation could be seen for the ultimate tensile strength. 5…”

mentioning

confidence: 85%

“…Significant progress has been seen in casting capability and understanding of the relation between the microstructure and mechanical properties of AZ91. These relations were established experimentally [2][3][4] and modeled for quantitative prediction [5][6][7]. The microstructure of AZ91D consists of the primary α-Mg and a highly divorced eutectic consisting of α-Mg and Mg 17 Al 12 .…”

Section: Introductionmentioning

confidence: 99%

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Effect of Mg17Al12 Fraction on Mechanical Properties of Mg-9%Al-1%Zn Cast Alloy

Dini

Andersson

Jarfors

2016

Metals

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In the current study it was observed that the offset yield point of Mg-9%Al-1%Zn alloy was strongly influenced by the connectivity of Mg 17 Al 12 . It was suggested that an increase in the fraction of Mg 17 Al 12 from 8% to 11% could lead to the formation of a Mg 17 Al 12 network which resulted in a higher offset yield point. In addition, it was observed that elongation to failure of the Mg-9%Al-1%Zn alloy strongly depended on the fraction of Mg 17 Al 12 . Moreover, the apparent toughness showed a strong inverse relation to the secondary dendrite arm spacing. This approach might be extended to forecast the behavior in other magnesium alloys forming a network of the Mg-Al phase.

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confidence: 85%

Section: Introductionmentioning

confidence: 99%

Effect of Mg17Al12 Fraction on Mechanical Properties of Mg-9%Al-1%Zn Cast Alloy

Dini

Andersson

Jarfors

2016

Metals

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“…The tensile strength of magnesium alloy is relatively lower than other structure metals, and therefore the mechanical properties of magnesium alloy were also investigated and reported widely [17][18][19]. Usually, the inner defects are the main factors led to the drop of the tensile strength to the cast magnesium alloy.…”

Section: Introductionmentioning

confidence: 99%

“…Usually, the inner defects are the main factors led to the drop of the tensile strength to the cast magnesium alloy. Prakash et al [18] found that the shrinkage porosity gives more influence on failure compared with other inhomogeneities. Additionally, the b phase (b.c.c.…”

Section: Introductionmentioning

confidence: 99%

Study on the effect of corrosion on the tensile behavior of an AZ91 alloy

Wang

Liu

Zhang

et al. 2010

Materials & Corrosion

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The effect of corrosion on the tensile behavior of an as-cast AZ91 alloy was investigated via systematical experiments. The corrosion residual strength of the AZ91 magnesium alloy is approximately negative linear dependent on the extreme depth of corrosion pit, which was quantitatively obtained by the corrosion morphology analysis and the statistic analysis. Experimental results reveal that the corrosion residual strength of the AZ91 magnesium alloy dropped quickly in the first 40 h due to the initiation and development of the corrosion pit and subsequently decreased slowly as a result of the development of the corrosion pit encountered the b phase. The b phase at the grain boundary of the primary a phase acts as an effective barrier to prevent the development of the corrosion pit into the alloy matrix and thus remarkably prevents the drop of the corrosion residual strength. In general, the variation of the corrosion residual strength exhibits an exponential decay regulation within the testing time. Consequently, the empirical prediction of the corrosion residual strength was given with regard to the variation of the corrosion residual strength varied with the immersion time.

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“…Significant grain refinement by equal channel angular pressing (ECAP) has been demonstrated in Mg alloys [6][7][8][9][10][11][12][13][14][15][16][17][18][19] . When a squeeze cast AZ31 was subjected to ECAP at 473K for up to four passes following route B c , the grain size achieved 1-3 μ m [10] .…”

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confidence: 99%