Surface roughness of a hot-dipped galvanized sheet steel as a function of deformation mode
Surface roughness of a hot-dipped galvanized sheet steel as a function of deformation mode
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DOI：
10.1016/j.jmatprotec.2004.06.017
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发表时间：
2005-03-30
影响因子：
6.3
通讯作者：
Van Tyne, CJ
中科院分区：
文献类型：
--
作者：
Wichern, CM;De Cooman, BC;Van Tyne, CJ
用三种不同的实验室测试系统：Marciniak冲压系统、平模摩擦测试系统和杯形系统对热镀锌钢板进行了变形。这些系统能够对薄板施加各种变形模式的组合。变形方式包括：(1)无模具接触应变，(2)滑动，(3)挤压，(4)弯曲。电栅样品的应变测量是在与表面轮廓术测量相同的位置进行的，从而允许表面粗糙度与应变直接对应。确定了粗化作为应变、滑动和弯曲的函数的量化。粗化率取决于应变水平和应变路径。在没有模具接触的情况下，应变增加导致表面粗糙度增加，应变路径接近平面应变时表现出最高的粗化率。滑动、挤压和弯曲的变形模式会导致表面粗糙度降低(即平滑)。提出了一个一阶模型来解释表面粗糙度随这些变形模式的变化。(C)2004爱思唯尔B.V.保留所有权利。
A hot-dipped galvanized zinc-coated sheet steel was deformed with three different laboratory test systems: a Marciniak punch system, a flat-die friction test system, and a cupping system. These systems were able to impose various combinations of deformation modes to the sheet. The deformation modes include: (1) strain without die contact, (2) sliding, (3) pressing, and (4) bending. Strain measurements from the electrolitically gridded specimens were made at the same locations as surface profilometry measurements, allowing a direct correspondence of surface roughness with strain. Quantification of the roughening as a function of strain, sliding and bending was determined. The roughening rate depends upon the strain level as well as the strain path. Increased strain without die contact causes an increase in the surface roughness with strain paths close to plane strain exhibiting the highest roughening, rate. The deformation modes of sliding, pressing, and bending cause a decrease in the surface roughness (i.e. smoothing) to occur. A first-order model is proposed to account for the surface roughness as a function of these deformation modes. (c) 2004 Elsevier B.V. All rights reserved.