Microstructure and Mechanical Properties of Al-12Si Alloy under Pressurized Solidification

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Microstructure and Mechanical Properties of Al-12Si Alloy under Pressurized Solidification
Vol. 37, Issue 10, Pages: 1081-1083(2017)
Published： 2017 ，
DOI： 10.15980/j.tzzz.2017.10.011

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[1]姜峰,张广安,张志浩,索忠源,王毅坚.比压对Al-12Si合金挤压铸造组织和性能的影响[J].特种铸造及有色合金,2017,37(10):1081-1083.

Jiang Feng, Zhang Guang’an, Zhang Zhihao, et al. Microstructure and Mechanical Properties of Al-12Si Alloy under Pressurized Solidification. [J]. Special Casting & Nonferrous Alloys 37(10):1081-1083(2017)
[1]姜峰,张广安,张志浩,索忠源,王毅坚.比压对Al-12Si合金挤压铸造组织和性能的影响[J].特种铸造及有色合金,2017,37(10):1081-1083. DOI： 10.15980/j.tzzz.2017.10.011.

Jiang Feng, Zhang Guang’an, Zhang Zhihao, et al. Microstructure and Mechanical Properties of Al-12Si Alloy under Pressurized Solidification. [J]. Special Casting & Nonferrous Alloys 37(10):1081-1083(2017) DOI： 10.15980/j.tzzz.2017.10.011.

研究在不同比压下凝固的Al-12Si铝合金的组织和力学性能。结果表明

在压力下凝固时

该合金组织发生明显变化

抗拉强度、伸长率和洛氏硬度均显著提高。当比压为0

50MPa时

随着比压的增加

初生α-Al晶粒尺寸和共晶Si粒子长宽比均显著减小

Si相形貌由长针状变成细小的蠕虫状与颗粒状

断口形貌由常压下的脆性断裂转变成韧性断裂。

Microstructure and mechanical properties of Al-12Si alloy under pressurized solidification were investigated by OM

SEM and hardness testing.The results reveal that microstructure of the alloy is changed with pressurized solidification.And the tensile strength

elongation and hardness of the alloy are improved remarkably.When the specific pressure is increased from 0 MPa to 650 MPa

the size of primaryα-Al and aspect ratio of eutectic Si phase is decreased obviously.Meanwhile

the morphology of eutectic Si particles is changed from long needle-like to small vermicular and granular structure

and the fracture morphology is changed from brittle fracture to ductile one.

Al-12Si合金比压组织细化力学性能

Al-12Si AlloySpecific PressureStructure RefinementMechanical Properties

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