王震,王爱琴,谢敬佩

• 1:河南科技大学材料科学与工程学院
• 2:有色金属共性技术河南省协同创新中心

摘要(Abstract)：

在Gleeble-1500D热模拟机上对纳米SiCp/Al复合材料试样进行了单向热压缩试验,研究其在变形温度为460～520℃、应变速率为0.1～5 s~(-1)条件下的高温变形行为。根据实验数据绘制出纳米SiCp/Al复合材料的真应力-真应变曲线,利用双曲正弦函数模型构建纳米SiCp/Al复合材料的应变补偿本构方程,并通过误差分析对该应变补偿本构方程的准确性进行验证。结果表明:纳米SiCp/Al复合材料的流变应力曲线均呈现出先升高至峰值随后缓慢下降的趋势,流变应力随着变形温度的升高和应变速率的降低而减小;在本文试验条件下纳米SiCp/Al热变形激活能的平均值为278.79 kJ/mol;通过应变补偿本构方程得到的流变应力预测值与试验值的线性相关系数为0.991,平均相对误差为2.05%。

关键词(KeyWords)： 纳米SiCp/Al复合材料;热变形;应变补偿;本构方程

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51771070)

作者(Author): 王震,王爱琴,谢敬佩

DOI: 10.13289/j.issn.1009-6264.20176264.2019-0025

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