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Investigate the influence of solidification cooling rates on phase evolution, microstructure, and mechanical performance of cast Al-13Si-4Cu-1Mg-2Ni piston alloy.

July 18, 2018MaterialsOpen Access

Effects of Solidification Cooling Rate on the Microstructure and Mechanical Properties of a Cast Al-Si-Cu-Mg-Ni Piston Alloy

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Authors

LTLusha TianXi'an Technological University YGYongchun GuoSichuan University JLJianping LiXi'an Technological University

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Implication

Experimental study demonstrates enhanced tensile strength and microstructural refinement in cast Al-Si-Cu-Mg-Ni alloy at higher cooling rates, indicating improved durability for engine pistons.

Key Points

Investigate the influence of solidification cooling rates on phase evolution, microstructure, and mechanical performance of cast Al-13Si-4Cu-1Mg-2Ni piston alloy.
Subjected Al-13Si-4Cu-1Mg-2Ni alloy to solidification cooling rates of 0.15, 1.5, 15, 150, and 1.5 × 10⁵ °C/s.
Measured secondary dendrite arm spacing, phase constituents, Brinell and micro-Vickers hardness, and room-temperature tensile properties across cooling conditions.
Increasing the cooling rate from 0.15 to 15 °C/s increased hardness from 80.9 to 125.7 HB, tensile strength from 189.3 to 282.5 MPa, and elongation from 1.6% to 2.8%.
Secondary dendrite arm spacing decreased according to D = 47.126v^(-1/3), with higher rates eliminating the ε-Al₃Ni phase, precipitating the Q phase, and refining δ and γ phases.
Accelerating cooling up to 1.5 × 10⁵ °C/s increased microhardness from 131.2 to 195.6 HV and induced a uniform structure containing nanocrystals.

Cite This Study

Tian et al. (2018) studied this question.

synapsesocial.com/papers/6ab0b46ef3197398f4853bcc https://doi.org/10.3390/ma11071230

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Implication

Experimental study demonstrates enhanced tensile strength and microstructural refinement in cast Al-Si-Cu-Mg-Ni alloy at higher cooling rates, indicating improved durability for engine pistons.

Effects of Solidification Cooling Rate on the Microstructure and Mechanical Properties of a Cast Al-Si-Cu-Mg-Ni Piston Alloy

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Cite This Study

Effects of Solidification Cooling Rate on the Microstructure and Mechanical Properties of a Cast Al-Si-Cu-Mg-Ni Piston Alloy

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Implication

Key Points

Cite This Study

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