Ageing characteristics of dendritic and non-dendritic (stir-cast) Zn-Al alloy (ZA-27)

LeHuy, H.; L’Éspérance, Gilles

doi:10.1007/bf00576558

Cited by 22 publications

(11 citation statements)

References 8 publications

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“…The new members of the ZA casting alloy family are ZA8, ZA12, and ZA27 [1]. Among these alloys, ZA27 exhibits attractive physical and mechanical properties combined with high tensile strength and wear resistance properties, making it a bearing alloy as replacement of their conventional counterparts like aluminum casting alloys, bearing bronzes, and cast iron in various engineering applications [2][3][4][5][6]. To meet the growing demands for application of these alloys in industry, further investigations on the correlations among the thermo-mechanical process parameters, the microstructure evolution of the materials, and the mechanical properties need to be considered [7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Constitutive modeling for hot deformation behavior of ZA27 alloy

Liu

et al. 2012

J Mater Sci

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The hot deformation behavior of ZA27 alloy was investigated in the temperature range of 473-523 K with the strain rates in the range of 0.01-5 s -1 and the height reduction of 60 % on Gleeble-1500 thermo mechanical simulator. Based on the experimental results, constitutive equations incorporating the effects of temperature, strain rate, and strain have been developed to model the hot deformation behavior of ZA27 alloy. Material constants, a, n, ln A, and activation energy Q in the constitutive equations were calculated as a function of strain. The results showed that the stress-strain curves of ZA27 alloy predicted by the constitutive equations are in good agreement with experimental results, which validates the efficiency of the constitutive equations in describing the hot deformation behavior of the material.

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Section: Introductionmentioning

confidence: 99%

Constitutive modeling for hot deformation behavior of ZA27 alloy

Liu

et al. 2012

J Mater Sci

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“…As is known, both work-softening and anneal-hardening are special characteristics of ZA alloys [9][10][11][12], which are mostly attributed to the complicated microstructures under equilibrium and metastable states, by various phases transformation including eutectic, eutectoid, peritectic reactions, etc. [13,14]. According to the previous investigations [12,14], homogenization always to be the best choice for microstructure uniformity, but something new should be tried.…”

Section: Microstructure Characteristics Of As-cast Zn-16al Alloy Durimentioning

confidence: 99%

“…[13,14]. According to the previous investigations [12,14], homogenization always to be the best choice for microstructure uniformity, but something new should be tried.…”

Section: Microstructure Characteristics Of As-cast Zn-16al Alloy Durimentioning

confidence: 99%

“…According to literatures [9][10][11][12][13][14], and comprehensively analyze the distribution regularities and the precipitation characteristics of this phase, the formation mechanism can be proposed. Considering the kinetic theory, atomic diffusion, and phase transformation characteristics, the precipitation of the g phase is attributed to the interaction made by the following factors.…”

Section: Formation Mechanism Of Needle-shaped G Phasementioning

confidence: 99%

“…a 0 þ g also turns up. Lehuy [14] revealed that during the decomposition of supersaturated a phase, one or more metastable phases would exist before the appearance of equilibrium phases, FIGURE 6.-X-ray diffraction and energy dispersive spectrometer analysis of the new white phase. which will make the procedure complicated and takes more time and energy to finish.…”

Section: Formation Mechanism Of Needle-shaped G Phasementioning

confidence: 99%

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Microstructure Characteristics of As-Cast Zn-16Al Alloy during Homogenization Treatment

Lin

Lei

Zhang

et al. 2013

Materials and Manufacturing Processes

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Homogenization treatment of as-cast Zn-16Al alloy was investigated. Effects of various parameters on the microstructure transformation and the mechanical properties were researched with the methods of hardness test, tensile test, scanning electron microscopy analysis, etc. The results indicate that 360 C Â 8 h with furnace cooling is the most reasonable homogenization process for Zn-16Al alloy. Additionally, a new kind of needle-shaped or shuttle-shaped g phase is observed during the furnace-cooled homogenization, which exhibits an extremely regular distribution with an included angle of 120 and a location between the lamellar eutectoids (a þ g). The formation of the new g phase is mainly attributed to the Al-depleted-zones left behind by the decomposition of supersaturated a phase. The a 0 phase precipitating from eutectoid reaction a ! a 0 þ g contains a much higher Al-content than that of original a phase.

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