High temperature compression properties of open-cell Ni-20Cr foams produced by impregnation

被引：14

作者：

Xiao, Lijun ^{[1
]}

Song, Weidong ^{[1
]}

Tang, Huiping ^{[2
]}

Zhu, Zhiwu ^{[3
]}

Wang, Jianzhong ^{[2
]}

Wang, Hui ^{[4
]}

机构：

[1] Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China

[2] Northwest Inst Nonferrous Met Res, State Key Lab Porous Met Mat, Xian 710016, Peoples R China

[3] Southwest Jiaotong Univ, Sch Mech & Engn, Appl Mech & Struct Safety Key Lab Sichuan Prov, Chengdu 610031, Peoples R China

[4] Xian Sailong Met Mat Co Ltd, Xian 710016, Peoples R China

来源：

MATERIALS & DESIGN | 2015年 / 85卷

关键词：

Open-cell Ni-20Cr foam; Impregnation; Compression; Temperature; Constitutive model; MECHANICAL-PROPERTIES; ALLOY FOAMS; DEFORMATION; IMPACT; AL; BEHAVIOR; POROSITY;

D O I：

10.1016/j.matdes.2015.06.167

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The mechanical properties of open-cell Ni-20Cr foams were studied by uniaxial compression tests, which were performed at a strain rate of 10(-3) s(-1) at ambient temperature, 250 degrees C, 400 degrees C and 550 degrees C respectively. Then, the effect of temperature on the mechanical properties of these foams was analyzed. It was found that both the compressive strength and energy absorbed by Ni-20Cr foam at elevated temperatures became lower than those at room temperature. The compressive strength changed with temperatures in a form of parabola, which satisfied the model derived from Gibson-Ashby model combined with Kocks' kinetic model. A multi-parameter phenomenological elasto-plastic constitutive model was modified to take the temperature effect into consideration. The relationships between model parameters and temperature were determined. The fitting stress strain curves of the model were in good agreement with the experimental results. (C) 2015 Elsevier Ltd. All rights reserved,

引用

页码：47 / 53

页数：7

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