Effects of Ultrasonic Vibration on Solidification Microstructure of 7085 Aluminum Alloy

Liu Zhilong; Zhang Lihua; Jiang Ripeng

doi:10.15980/j.tzzz.2013.10.001

Views : 0 下载量: 205 CSCD: 1

Export
Share
Collection
Album

Effects of Ultrasonic Vibration on Solidification Microstructure of 7085 Aluminum Alloy
Vol. 33, Issue 10, Pages: 969-973(2013)
Published： 2013 ，
DOI： 10.15980/j.tzzz.2013.10.001

扫描看全文

[1]刘智龙,张立华,蒋日鹏.超声振动对7085铝合金微观组织的影响[J].特种铸造及有色合金,2013,33(10):969-973.

Liu Zhilong, Zhang Lihua, Jiang Ripeng. Effects of Ultrasonic Vibration on Solidification Microstructure of 7085 Aluminum Alloy. [J]. Special Casting & Nonferrous Alloys 33(10):969-973(2013)
[1]刘智龙,张立华,蒋日鹏.超声振动对7085铝合金微观组织的影响[J].特种铸造及有色合金,2013,33(10):969-973. DOI： 10.15980/j.tzzz.2013.10.001.

Liu Zhilong, Zhang Lihua, Jiang Ripeng. Effects of Ultrasonic Vibration on Solidification Microstructure of 7085 Aluminum Alloy. [J]. Special Casting & Nonferrous Alloys 33(10):969-973(2013) DOI： 10.15980/j.tzzz.2013.10.001.

摘要

基于元胞自动机-有限元（CAFE）法

建立了7085铝合金形核和晶粒生长的数学模型

运用扩展的KGT模型计算得到了7085铝合金的生长动力学参数。模拟和试验结果表明

熔体经超声处理

晶粒组织明显细化

晶粒平均尺寸由未施加超声时的535μm减小为241μm（170W）和197μm（240W）

组织形貌由枝状晶变为细小等轴晶。在超声作用下

形核率增加是晶粒细化的主要原因

晶核生长速度变化属于次级效应

对最终晶粒尺寸影响较小。

Abstract

Based on the process of coupling cellular automaton with finite element

the mathematical model of nucleation and grain growth of 7085aluminum alloy was established.Growth kinetics parameters of7085aluminum alloy were given by using extended KGT model calculation.The simulated and experimental results show that the grain size is obviously refined and the morphology of grain is changed into equiaxed grain from dendrite.Meanwhile

the average grain size is decreased from 535μm without ultrasonic to 241μm（170W）and 197μm（240W）.The increase of nucleation rate plays a main role in grain refinement

and the contribution of grain nucleation growth is the minor effect.