【摘 要】
：
通过Ti6Al4V/TA1扩散偶的制备及其热处理试验,运用OPM,SEM以及EDS技术对扩散连接区域的组织、形貌、成分进行分析.结果表明:扩散连接界面充分结合,合金元素Al和V从Ti6A14V侧
【机 构】
：
西北工业大学国家凝固重点实验室,西安石油大学材料科学与工程学院
论文部分内容阅读
通过Ti6Al4V/TA1扩散偶的制备及其热处理试验,运用OPM,SEM以及EDS技术对扩散连接区域的组织、形貌、成分进行分析.结果表明:扩散连接界面充分结合,合金元素Al和V从Ti6A14V侧向TA1侧扩散,而Ti原子向Ti6Al4V侧扩散,其成分过渡区满足抛物线规律;同时,根据柯勒方程,借助米德玛生成热模型,从热力学上推导三元体系的计算公式,得出热力学相互作用因子,并根据求得溶质元素的互扩散系数,通过唯象公式的数值解法,得出扩散元素在连接界面处的理论浓度分布图;实验值与理论模拟结果吻合得很好,因此,能够很好的预测扩散连接界面相关元素的浓度分布.
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