摘要
采用热压复合工艺在不同温度下制备出了Ti/Al复合层板,利用SEM、EDS和XRD对界面的组织形貌、元素和相种类进行了表征,并进行了拉伸试验以研究热压温度对Ti/Al复合层板力学性能的影响。结果表明,热压过程中铝原子和钛原子在界面处发生了扩散反应,在600℃以下,Ti/Al界面平直无任何杂质等缺陷,且界面处无金属间化合物生成,实现了良好的冶金结合,其中550℃制备出的Ti/Al复合层板具有较大的抗拉强度和伸长率。而在600℃下制备出的Ti/Al复合层板的界面处有Al_3Ti新相薄层生成,这种脆性相大大降低了材料的韧性。
Ti/Al composite laminates were fabricated through vacuum hot pressing using Ti and A1 foils at different sintering temperatures. The microstructure, phase formation and elements of Ti/Al interface were evaluated by scanning electron microscopy （SEM）, energy dispersive spectroscopy （EDS） and X-ray diffractometry （XRD）. And the tensile tests were conducted to investigate the effects of hot pressing temperature on mechanical properties of Ti/Al composite laminates. The results show that no intermetallic compounds form and the interfaces are straight without any impurities when the sintering temperature was lower than 600℃, and the interface achieves a good metallurgical bond. Moreover, Ti-AI composite laminates prepared at 550℃ have the perfect combination of strength and toughness, but at 600℃, the elongation is minimum owing to the formation of brittle Al3Ti.
出处
《热加工工艺》
CSCD
北大核心
2017年第22期109-112,117,共5页
Hot Working Technology
基金
国家自然科学基金资助项目(51475231)
江苏高校优势学科建设工程资助项目(2016-2018)
关键词
热压温度
显微结构
力学性能
Ti/Al
复合层板
hot pressing temperature
microstructure
mechanical properties
Ti-A1 laminate composite
作者简介
吴倩（1992-），女，安徽安庆人，硕士研究生，研究方向为金属层状复合材料的热压工艺：电话：15950537267；
