Microstructural Refinement and Corrosion Resistance Improvement of Heat-Treated A356 Alloy Processed by Equal Channel Angular Pressing

被引：6

作者：

Gebril, M. A. ^{[1
,2
]}

Omar, M. Z. ^{[1
]}

Othman, N. K. ^{[3
]}

Mohamed, I. F. ^{[4
]}

机构：

[1] Univ Kebangsaan Malaysia, Ctr Mat Engn & Smart Mfg, Ukm Bangi 43600, Selangor Darul, Malaysia

[2] Benghazi Univ, Fac Engn, Dept Mech Engn, Benghazi, Libya

[3] Univ Kebangsaan Malaysia, Fac Sci & Technol, Sch Appl Phys, Ukm Bangi 43600, Selangor Darul, Malaysia

[4] Univ Kebangsaan Malaysia, Fuel Cell Inst, Ukm Bangi 43600, Selangor Darul, Malaysia

来源：

SAINS MALAYSIANA | 2019年 / 48卷 / 12期

关键词：

A356 aluminium alloy; corrosion rate; ECAP; grain size; heat treatment; MECHANICAL-PROPERTIES; ALUMINUM-ALLOY; PITTING CORROSION; HARDNESS HOMOGENEITY; TENSILE PROPERTIES; BEHAVIOR; ECAP; MORPHOLOGY; CAST;

D O I：

10.17576/jsm-2019-4812-16

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The microstructure refinement, hardness and corrosion resistance of heat-treated A356 aluminium alloy processed by equal-channel angular pressing (ECAP) were investigated. ECAP was carried out at room temperature using a mold, with a channel angle of 120 degrees via route A. Results of the investigation confirm that the flaky coarse silicon particles were effectively fragmented from 4.22 to 0.761 mu m and the grain size reduced from 171 to 40 mu m after four passes of heat-treated as-cast using ECAP process. ECAP processing increases the hardness of heat-treated as-cast alloy from 61 Hv to 125 HV after four passes. Heat-treated A356 alloy shows enhanced corrosion resistance from 0.0424 to 0.00149 mmy(-1), after four passes. In this research, ECAP processing has been shown to improve the hardness and corrosion resistance of as-cast A356 alloy.

引用

页码：2749 / 2757

页数：9

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