In this study, the effect of powder particle contents on the mechanical properties of aluminum-based hybrid composites produced by warm accumulative roll bonding (WARB) process was investigated. Three hybrid composite groups with fully annealed AA1060 strips, 1[Formula: see text]wt.% of MnO2 and 0, 7.5 and 15[Formula: see text]wt.% of TiO2 were first roll-bonded and then the ARB process continued up to eight rolling cycles. In the WARB process, the samples were preheated at 300∘C for 5[Formula: see text]min before each rolling cycle. It was realized that increasing the number of ARB cycles with 0 and 7.5[Formula: see text]wt.% of TiO2 particles improved the uniformity of TiO2 particles distribution in the aluminum matrix. Also, in samples with high contents of TiO2 particles (15%), TiO2 clusters converted into small clusters with a better distribution through the aluminum matrix. Also, by increasing the number of cycles and TiO2 wt.% up to 15%, the tensile strength, elongation, tensile toughness and average Vickers microhardness of hybrid composites were increased first and decreased then. Moreover, the effects of ARB cycles and TiO2[Formula: see text]wt.% on the fracture surface of hybrid composites have been studied by scanning electron microscopy (SEM). It was found that all the samples fabricated with one and two ARB cycles exhibited a typical ductile fracture containing deep dimples, whereas by increasing the TiO2[Formula: see text]wt.% and ARB cycles, a combination of ductile and shear ductile fracture have been detected in the fracture behavior.

中文翻译：

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TIO2 颗粒对 WARB 制造的混合铝基复合材料的力学和微观结构演化的影响

在这项研究中，研究了粉末颗粒含量对通过温积辊粘合（WARB）工艺生产的铝基杂化复合材料的力学性能的影响。三个具有完全退火 AA1060 条带的杂化复合材料组，1[公式：见正文] wt.% of MnO2和 0、7.5 和 15 [公式：见正文] wt.% 的 TiO2首先进行滚压粘合，然后 ARB 工艺持续到八个滚压循环。在 WARB 过程中，样品在 300∘C 为每个滚动循环前 5[公式：见正文]分钟。人们意识到，随着 0 和 7.5 [公式：见文本]wt.% 的 TiO2 增加 ARB 循环次数2颗粒提高了 TiO2 的均匀性2铝基体中的颗粒分布。此外，在 TiO 含量高的样品中2颗粒 (15%), 二氧化钛2簇转化为较小的簇，在铝基体中分布更好。此外，通过增加循环次数和 TiO2wt.%至15%时,杂化复合材料的抗拉强度、伸长率、抗拉韧性和平均维氏显微硬度先增大后减小。此外，ARB 循环和 TiO2 的影响2[公式：见正文] 采用扫描电子显微镜（SEM）研究了杂化复合材料断裂面上的wt.%。结果发现，使用 1 次和 2 次 ARB 循环制造的所有样品都表现出典型的韧性断裂，其中包含深凹坑，而通过增加 TiO22[公式：见正文]wt.%和ARB循环，在断裂行为中检测到了韧性断裂和剪切韧性断裂的组合。