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Effects of Internal Oxidation Methods on Microstructures and Properties of Al2O3 Dispersion-Strengthened Copper Alloys Read chapter Read first chapter

2018 | OriginalPaper | Chapter

Aging Time on the Microstructure and Mechanical Properties of A356 Alloy by Semi-solid Processing

Authors : Peng Qi, Bolong Li, Wenjian Lv, Shasha Dong, Tongbo Wang, Ning Li, Zuoren Nie

Published in: High Performance Structural Materials

Publisher: Springer Singapore

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Abstract

An investigation was carried out to study the effects of aging time on the microstructure and mechanical properties of A356 alloy by semi-solid processing. The alloy was subjected to solution treatment for 4 h at 540 °C, artificial ageing was carried out at temperature (170 °C) and different time (0–24 h). The results revealed that the needle-shaped eutectic Si phase in as-cast ingot was transformed to globular shape compared with that by solution treatment. Meanwhile the Chinese script π-Fe(AlMgSiFe) phase was transformed to smaller and uniformly distributed β-Fe(AlFeSi) phase, the elongation increased obviously. With the increasing of aging time, the elongation decreased, and the ultimate tensile strength increased. When the aging time was 4 h, the alloy achieved the optimal mechanical properties. The micro-hardness was 121HV, ultimate tensile strength was 329 MPa, and the elongation was 15%. From the fracture morphology, the fracture for alloy aging for 4 h showed more dimples. With the increasing of aging time, the ultimate tensile strength and the elongation decreased.

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Metadata
Title
Aging Time on the Microstructure and Mechanical Properties of A356 Alloy by Semi-solid Processing
Authors
Peng Qi
Bolong Li
Wenjian Lv
Shasha Dong
Tongbo Wang
Ning Li
Zuoren Nie
Copyright Year
2018
Publisher
Springer Singapore
Book
High Performance Structural Materials

Print ISBN: 978-981-13-0103-2

Electronic ISBN: 978-981-13-0104-9

Copyright Year: 2018

DOI
https://doi.org/10.1007/978-981-13-0104-9_13

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