The effect of heat treatment on anisotropy behavior and formability of three-layer composite sheets using digital image correlation method

IF 3.5 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Science Pub Date : 2024-11-18 DOI:10.1007/s10853-024-10443-8

Mohammad Delshad Gholami, Behnam Davoodi, Ramin Hashemi

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引用次数: 0

Abstract

The rolling process causes anisotropic behavior in metal sheets. The purpose of this research is to study the influence of annealing heat treatment on the anisotropy properties and its relationship with the formability behavior of three-layer brass (CuZn10)/steel (St14)/brass (CuZn10) composite sheet. The samples were fabricated using the cold roll bonding (CRB) process, annealed at different temperatures for two hours, and cooled in the furnace. The uniaxial tensile test was performed in different directions (0°, 45°, 90°), and the anisotropy value of the samples was obtained using the digital image correlation (DIC) method. The formability of the samples was determined experimentally through the forming limit diagram (FLD) by the Nakazima test. The results indicated that the value of normal anisotropy (r_m) increases with the increase of annealing temperature. This trend for FLD₀ is similar to the anisotropy changes, which shows that increasing the annealing temperature improves the formability behavior of the three-layer composite. However, the changes in FLD₀ and r_m at different annealing temperatures are not the same, which can be attributed to the occurrence of recrystallization in steel and brass layers. For this purpose, the microstructure and grain size of the steel layer were examined by an optical microscope (OM). The emergence of new grains at temperatures higher than 600 ℃ was quite evident in the steel sample, indicating static recovery and recrystallization.

Graphical Abstract

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利用数字图像相关法研究热处理对三层复合片材各向异性行为和可成形性的影响

轧制过程会导致金属板的各向异性。本研究的目的是研究退火热处理对三层黄铜（CuZn10）/钢（St14）/黄铜（CuZn10）复合板材各向异性特性的影响及其与成形性的关系。样品采用冷轧粘合（CRB）工艺制作，在不同温度下退火两小时，然后在炉中冷却。在不同方向（0°、45°、90°）上进行了单轴拉伸试验，并使用数字图像相关（DIC）方法获得了样品的各向异性值。样品的成型性是通过中岛试验的成型极限图（FLD）进行实验测定的。结果表明，正各向异性（rm）值随退火温度的升高而增加。FLD0 的变化趋势与各向异性的变化趋势相似，这表明提高退火温度可以改善三层复合材料的成型性能。然而，不同退火温度下 FLD0 和 rm 的变化并不相同，这可能是由于钢层和黄铜层发生了再结晶。为此，我们使用光学显微镜（OM）对钢层的微观结构和晶粒大小进行了检测。在温度高于 600 ℃ 的钢样中，新晶粒的出现非常明显，这表明存在静态恢复和再结晶现象。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Materials Science 工程技术-材料科学：综合

CiteScore

7.90

自引率

4.40%

发文量

1297

审稿时长

2.4 months

期刊介绍： The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.