Abstract

In this study, the cross accumulative roll-bonding (CARB) process, as an improved technique of the conventional accumulative roll-bonding (ARB), was conducted on the AA1050 sheet up to 10 passes in two processing modes. The specimens were either preheated before the rolling step of CARB passes and promptly roll bonded (warm CARB) or were processed at room temperature (cold CARB). The microstructure of samples was characterized using a scanning electron microscope. The effect of intermediate heat treatment on the planar homogeneity of the mechanical properties in the CARB (and even ARB) deformed sheets has not been examined yet. Hence, the present research focuses on the comparison of the planar isotropy of tensile properties between warm and cold CARB products. Also, the uniformity of microhardness distribution throughout the thickness of samples was evaluated. The warm CARB presented higher elongation, lower tensile strength and microhardness with more uniformity of the microhardness distribution, and also premier planar isotropy of the mechanical properties than the cold CARB.

Graphic Abstract

中文翻译：

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交叉累积轧制过程中的中间加热对商品纯铝板力学性能的平面各向同性的影响

摘要

在这项研究中，作为传统累积式辊压粘结（ARB）的一项改进技术，交叉累积式辊压粘结（CARB）工艺在AA1050板材上以两种加工方式进行了多达10道次的加工。在CARB的轧制步骤通过之前将样品预热并立即进行辊压粘合（温暖的CARB），或者在室温下进行处理（冷CARB）。使用扫描电子显微镜表征样品的微观结构。尚未研究中间热处理对CARB（甚至ARB）变形板材的机械性能平面均匀性的影响。因此，目前的研究集中在冷热CARB产品之间拉伸性能的平面各向同性的比较。也，评估了整个样品厚度的显微硬度分布的均匀性。相对于冷CARB，温暖的CARB具有更高的伸长率，更低的拉伸强度和更低的显微硬度，以及更高的显微硬度分布均匀性，并且还具有出色的力学性能平面各向同性。

图形摘要