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Affiliation of Author(s):

冶金工程学院

Journal:

International Journal of Cast Metals Research

Key Words:

中文关键字：合金;凝固;枝晶生长;结晶;振动，英文关键字：Nucleation, Solidification, Dendritic growth, Crys

Abstract:

The nucleation and detachment of grains from a chilling surface were observed in real time in a model NH4Cl solution system. The effects of vibration frequency and amplitude on the detachment behaviour and crystallographic morphology of grains were also studied. The results show that partial dendrite arms were broken off under low frequency vibration, whereas the entire dendrite was broken off at its root under high frequency vibration. The higher the frequency and amplitude, the thinner the detached grains. The effect of frequency on the morphology of grains is much greater than that of amplitude, thus increasing vibration frequency is effective in forming fine granular grains, but not amplitude. The amount of detached grains increases with increasing vibration frequency and amplitude up to 1200 Hz and 80 mm; further increase in vibration frequency or amplitude reduced the amount of detached grains.

Note:

王文礼

First Author:

Kuaishe Wang,wangwenli

Indexed by:

Journal paper

Volume:

卷：23

Issue:

期：6

Page Number:

页：344-348

Translation or Not:

no

Date of Publication:

2010-10-01