Surface Micro-nano Crystallization of 2024 Alloy Induced by Machinery Multi-grinding

Zhao Yunlong; Wang Tao

doi:10.15980/j.tzzz.2018.08.001

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Surface Micro-nano Crystallization of 2024 Alloy Induced by Machinery Multi-grinding
Vol. 38, Issue 8, Pages: 813-815(2018)
Published： 2018 ，
DOI： 10.15980/j.tzzz.2018.08.001

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[1]赵云龙,王涛.2024铝合金表面机械多重碾磨微纳米化研究[J].特种铸造及有色合金,2018,38(08):813-815.

Zhao Yunlong, Wang Tao. Surface Micro-nano Crystallization of 2024 Alloy Induced by Machinery Multi-grinding. [J]. Special Casting & Nonferrous Alloys 38(8):813-815(2018)
[1]赵云龙,王涛.2024铝合金表面机械多重碾磨微纳米化研究[J].特种铸造及有色合金,2018,38(08):813-815. DOI： 10.15980/j.tzzz.2018.08.001.

Zhao Yunlong, Wang Tao. Surface Micro-nano Crystallization of 2024 Alloy Induced by Machinery Multi-grinding. [J]. Special Casting & Nonferrous Alloys 38(8):813-815(2018) DOI： 10.15980/j.tzzz.2018.08.001.

摘要

为提高2024（Al-Cu-Mg系）合金的力学性能

采用表面机械多重碾磨（MMGS）技术对其表面进行2道次的塑性变形。利用显微硬度测试、力学性能测试、透射电镜以及扫描电镜等测试手段

研究了经表面碾磨加工后的商用2024铝合金的显微硬度、力学性能和微观结构变化。结果表明

与T351状态相比

商用2024铝合金表面经过碾磨处理2道次后表层显微硬度（HV）最高可达185

提高了18%;屈服强度可达475 MPa

提高了22%;抗拉强度可达498 MPa

提高了16%;同时保持较高的伸长率。表层的晶粒被细化

平均尺寸约为800nm

表明MMGS方法是2024铝合金表面微纳米处理有效的方法之一。

Abstract

In order to improve the mechanical properties of 2024（Al-Cu-Mg series）alloy

machinery multi-grinding of the surface（MMGS）processing was applied to form two pass deformation.The microhardness

mechanical properties and microstructure changes in commercial 2024 aluminum alloy after MMGS were investigated by micro-hardness test

mechanical properties test

transmission electron microscopy（TEM）and scanning electron microscopy（SEM）.The results reveal that

compared with the T351 state

micro-hardness and yield strength as well as tensile strength of the surface reach about 185 HV

475 MPa and about 498 MPa

increased by 18%

22% and 16%

respectively.Grains size of the surface is refined to about 800 nm.MMGS processing is one of the effective methods for the 2024 aluminum alloy to obtain the micro-nano crystallization.