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润滑条件对AA6068铝合金冷变形行为影响的实验与数值研究

Experimental and Numerical Study on the Influence of Lubrication Conditions on AA6068 Aluminum Alloy Cold Deformation Behavior.

作者信息

Pop Mariana Florica, Neag Adriana Voica, Sas-Boca Ioana-Monica

机构信息

Faculty of Materials and Environmental Engineering, Technical University of Cluj Napoca, 28 Memorandumului Street, 400114 Cluj-Napoca, Romania.

出版信息

Materials (Basel). 2023 Mar 1;16(5):2045. doi: 10.3390/ma16052045.

DOI:10.3390/ma16052045
PMID:36903158
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10003770/
Abstract

The aim of this manuscript is the experimental and numerical study regarding the influence of friction conditions on plastic deformation behavior by upsetting the A6082 aluminum alloy. The upsetting operation is characteristic of a significant number of metal forming processes: close die forging, open die forging, extrusion, and rolling. The purpose of the experimental tests was to determine: by the ring compression method, the friction coefficient for 3 surface lubrication conditions (dry, mineral oil, graphite in oil) by using the Coulomb friction model; the influence of strains on the friction coefficient; the influence of friction conditions on the formability of the A6082 aluminum alloy upsetted on hammer; study of non-uniformity of strains in upsetting by measuring hardness; change of the tool-sample contact surface and non-uniformity of strains distribution in a material by numerical simulation. Regarding the tribological studies involving numerical simulations on the deformation of metals, they mainly focused on the development of friction models that characterize the friction at the tool-sample interface. The software used for the numerical analysis was Forge@ from Transvalor.

摘要

本文的目的是通过镦粗A6082铝合金，对摩擦条件对塑性变形行为的影响进行实验和数值研究。镦粗操作是大量金属成型工艺的特点：闭式模锻、开式模锻、挤压和轧制。实验测试的目的是：通过环压缩法，使用库仑摩擦模型确定3种表面润滑条件（干摩擦、矿物油、油中石墨）下的摩擦系数；应变对摩擦系数的影响；摩擦条件对在锤上镦粗的A6082铝合金可锻性的影响；通过测量硬度研究镦粗过程中应变的不均匀性；通过数值模拟研究工具-试样接触面的变化和材料中应变分布的不均匀性。关于涉及金属变形数值模拟的摩擦学研究，它们主要集中在开发表征工具-试样界面摩擦的摩擦模型上。用于数值分析的软件是Transvalor公司的Forge@。

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