SUS304不锈钢拉伸过程中的声-热像特征  

AE and Thermographic Characteristics of SUS304 during Tensile Process

作　　者：欧阳浩[1] 石健[1] 张志魁 赵广慧[1] OUYANG Hao SHI Jian ZHANG Zhikui ZHAO Guanghui(Mechatronic Engineering College of Southwest Petroleum University, Chengdu 610500, China China Petroleum Engineering Huabei Company, Renyue 062552, China)

机构地区：[1]西南石油大学机电工程学院,四川成都610500 [2]中国石油集团工程设计有限责任公司华北分公司,河北任丘062552

出　　处：《材料科学与工程学报》2017年第2期316-320,共5页Journal of Materials Science and Engineering

基　　金：石油与天然气装备教育部重点实验室开放基金资助项目(OGE201402-03);国家自然科学基金资助项目(11102173)和(51134004)

摘　　要：测量了含有Ⅰ型裂纹的SUS304不锈钢试样的单轴拉伸过程中的塑性变形和断裂。分析了裂纹尖端区域的塑性变形和断裂过程。结果表明:SUS304的各向异性在断裂阶段对声发射信号影响较大;红外热图像中的温度分布与塑性应变率有关;通过声发射参数和红外热图像可以从微观和宏观两方面分析裂纹尖端区域的塑性变形和断裂。Plastic deformation and fracture with I-type crack of SUS304 specimens were measured by acoustic emission （AE）, infrared thermography （TIR） and thermocouples during uniaxial tension process. Plastic deformation and fracture process around crack tip were discussed by AE parameters, TIR images and temperature distribution. The experimental results show that： the anisotropy of SUS304 has great influence on AE signals during fracture stage. The temperature distribution of TIR image is related to plastic strain rate. The plastic deformation and fracture of the crack tip region can be analyzed from microscopic and macroscopic aspects by acoustic emission parameters and infrared thermal image.

关 键 词：塑性变形 断裂 Ⅰ型裂纹 声发射 红外图像 

分 类 号：TG142.15[一般工业技术—材料科学与工程]