Modification of a Hypereutectic Aluminium Silicon Alloy under the Influence of Intensive Melt Shearing

Zuo, Yong; Fan, Z.; Zhu, Qianqian; Lei, Longyu; Cui, Jian Zhong

doi:10.4028/www.scientific.net/msf.765.140

Cited by 4 publications

(3 citation statements)

References 15 publications

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“…In a study, the hypereutectic aluminium alloy was physically modified with intensive melt shearing while solidifying and the effect on the microstructure was examined. 6 The results revealed that the shearing greatly refined the primary silicon with heat treatment playing a significant role; 660°C was recorded as the optimum temperature for Al-20wt%Si alloy Si particle refinement. A centrifugal in situ process was used to fabricate an Al-Al 2 Cu FGM ring from Al-3%Cu in a study, which reported the following findings: the a-Al particles drifted to the outer periphery of the ring; the presence of Cu in the ring was massive in the inner part; the hardness of the Al 2 Cu FGM ring increased towards the inner region and the specimen hardness increased tremendously after heat treatment.…”

Section: Introductionmentioning

confidence: 94%

“…Consequently, this modification and refinement improved the mechanical properties of the alloy. 6,[18][19][20] The inherent attributes of corrosion and wear resistance, light weight, the thermal and electrical conductivity of aluminium and its alloys and composites are resultant effects of microstructure modifications.…”

Section: Microstructurementioning

confidence: 99%

“…The particle acceleration variation and solidification model as related by equation (6) is represented in the graph in Figure 17. The graph shows that the particles of the Mg 2 Si and Al-Si possess different acceleration at the same speed.…”

Section: Microstructurementioning

confidence: 99%

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Improving the surface properties of a Pelton turbine bucket via centrifugal casting technique

Ebhota

Karun

Inambao

2017

Advances in Mechanical Engineering

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This study examines the possibility of fabricating a complex, non-cylindrical, Pelton turbine bucket by centrifugal casting technique. Oil hardening non-shrinking die steel material was selected for the permanent mould production, machined with computer numerical control and heat treated to a hardness of 432 BHN. Aluminium alloys, A390 and A390-5%Mg, were considered as the Pelton turbine bucket materials, cast and characterised. The effects of centrifugal casting technique and thermal treatment on the mechanical properties and corrosion resistance of A390 and A390-5%Mg alloys were studied. A hardness of 150 BHN (maximum) was recorded near the inner surface of the bucket and 157 BHN (maximum) was recorded at the outer periphery of the cylindrical cast. It was observed that A390-5%Mg by gravity casting shows higher corrosion resistance than the A390 alloy. Furthermore, the specimen from the outer zone of the circular cast shows a higher corrosion resistance than the specimen from the inner periphery.

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Section: Introductionmentioning

confidence: 94%