In situ observation of interlayer growth during heat treatment of friction weld joint between pure titanium and pure aluminium
In situ observation of interlayer growth during heat treatment of friction weld joint between pure titanium and pure aluminium
复制标题
DOI：
10.1179/136217102225006903
复制
发表时间：
2002-12
影响因子：
3.3
通讯作者：
A. Fuji
中科院分区：
文献类型：
--
作者：
A. Fuji
采用高温光学显微镜对纯钛和纯铝摩擦焊接头在853 K加热至173 ks（580°C，48 h）时，由金属间化合物相组成的中间层的生长进行了原位（直接）和连续的观察。得出了以下结论。该层从Al衬底生长到Ti衬底，并且既不是线性的也不是抛物线的时间依赖性可以用来描述层生长的速率。在每隔约36 ks（10 h）的加热间隔后，层生长停止一段时间（即几小时）。也就是说，在热处理期间出现了几个平台。认为Al-Ti二元金属间相的成核和这种核的生长对于层生长是必要的。纯Ti与高纯Al之间的接头的层间生长速率高于纯Ti与工业纯Al之间的接头，这是由于Al母材中的Si含量。有一个轻微的变化的层生长速率与位置沿着半径的关节和摩擦时间。
The growth of an intermediate layer, consisting of an intermetallic compound phase, in a friction welded joint between pure Ti and pure Al heated at 853 K for up to 173 ks (580°C, 48 h) was elucidated via an in situ (direct) and continuous observation method using a high temperature optical microscope. The following conclusions were reached. The layer grew from the Al substrate to the Ti substrate, and neither a linear nor a parabolic time dependence could be used to describe the rate of layer growth. The layer growth stopped for some time (i.e. several hours) after every heating interval of approximately 36 ks (10 h). That is, several plateaus appeared during heat treatment. It is thought that nucleation, and growth of such nuclei, of the Al- Ti binary intermetallic phase are necessary for layer growth. The interlayer growth rate for joints between pure Ti and highly pure Al was higher than that for joints between pure Ti and commercially pure Al. This is due to the Si content in the Al base metal. There was a slight variation of the layer growth rate with location along the radius of the joint and with friction time.