Equal channel angular pressing of Al–5 wt% TiB2 in situ composite
Equal channel angular pressing of Al–5 wt% TiB2 in situ composite
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DOI：
10.1016/j.jallcom.2007.05.025
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发表时间：
2008-07
影响因子：
6.2
通讯作者：
K. R. Ravi;M. Saravanan;R. M. Pillai;A. Mandal;B. S. Murty;M. Chakraborty;B. Pai
中科院分区：
文献类型：
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作者：
K. R. Ravi;M. Saravanan;R. M. Pillai;A. Mandal;B. S. Murty;M. Chakraborty;B. Pai
采用等通道转角挤压（ECAP）工艺对原位Al-5wt%TiB2复合材料进行了室温等通道转角挤压（ECAP）。在铸态条件下存在的约50-100μm尺寸的大颗粒自由区已通过ECA压制减小到20-30μm。经过4道次ECAP变形后，TiB 2的分布由原来的团簇状变为均匀状。采用ECA压制可使晶粒明显细化至≤ 500 nm，但平均粒径保持在0.5-0.6μm。
Equal channel angular pressing (ECAP) of in situ Al–5wt% TiB2composite was successfully carried out at room temperature up to four passes. Large particle free zones of about 50–100μm size present in as cast condition have been reduced to 20–30μm by ECA pressing. The initially clustered distribution of TiB2has become homogeneous after four ECAP passes. A significant grain refinement down to ∼500nm has been achieved by ECA pressing but the average particulates size remains unchanged at 0.5–0.6μm.