Pack rolling is an effective process for manufacturing Ti-6Al-4V products, especially thin sheets; however, it tends to cause surface defects. Surface ridging is the most significant surface defect produced during the pack rolling of thin sheets. Hence, in this study, the effects of pack-rolling conditions on the origin of surface ridging on Ti–6Al–4V alloy surfaces were investigated using experimental and numerical techniques. Pack rolling was carried out at temperatures of 830, 860, 930, and 980 °C until a thickness reduction of up to 30 % was achieved. The surface ridging mechanism, microstructural evolution, and mechanical properties after pack rolling were studied using optical microscopy, scanning electron microscopy in the backscattered electron mode, microhardness tests, and the finite element method to identify the influence of pack-rolling parameters and the surface quality at various temperatures. The stress, strain, and temperature distributions after pack rolling at different temperatures revealed that the difference in the plastic flow between the core and cover resulting from the temperature rise was the mechanism controlling surface ridging on the surface of the Ti–6Al–4V plate. These results can be used for optimizing the pack-rolling processes of Ti-6Al-4V alloys.

包轧是制造 Ti-6Al-4V 产品，尤其是薄板的有效工艺；然而，它往往会导致表面缺陷。表面起皱是薄板包装轧制过程中产生的最显着的表面缺陷。因此，在本研究中，使用实验和数值技术研究了压延条件对 Ti-6Al-4V 合金表面表面起皱起源的影响。包轧在 830、860、930 和 980 °C 的温度下进行，直到厚度减少了 30%。使用光学显微镜、背散射电子模式下的扫描电子显微镜、显微硬度测试、和有限元方法来识别不同温度下包装轧制参数和表面质量的影响。不同温度下包装轧制后的应力、应变和温度分布表明，由于温度升高导致芯层和覆盖层之间塑性流动的差异是控制 Ti-6Al-4V 板表面起皱的机制。这些结果可用于优化 Ti-6Al-4V 合金的压延工艺。不同温度下堆轧后的温度分布表明，温度升高导致芯层和覆盖层之间塑性流动的差异是控制 Ti-6Al-4V 板表面起皱的机制。这些结果可用于优化 Ti-6Al-4V 合金的压延工艺。不同温度下堆轧后的温度分布表明，温度升高导致的芯层和覆盖层之间塑性流动的差异是控制 Ti-6Al-4V 板表面起皱的机制。这些结果可用于优化 Ti-6Al-4V 合金的压延工艺。