压力容器2017，Vol.34Issue(2)：8-13,6.DOI:10.3969/j.issn.1001-4837.2017.02.002
聚乙烯管接头特征线弹性模量的微米压痕表征
Characterization of Elastic Modulus of Eigen-line in Polyethylene Pipe Joints Based on Microindentation Technique
摘要
Abstract
The elastic modulus of base material,welded zone and eigen-line in butt joints of polyethylene pipe was measured through microindentation tests,and the distribution of elastic modulus around eigen-line was obtained.Phased-array ultrasonic testing was also employed to get ultrasonic images of the butt joints.Results show that peaks exist in the distribution of elastic modulus,which are corresponding to the eigen-line in ultrasonic images,suggesting that elastic modulus of eigen-line is different from that of base material and welded zone.Further analysis reveals that the average elastic modulus of eigen-line rises by 4.7%~5.6% over the base material and welded zone,indicating that the welding process has an influence on the mechanical property of material around the eigen-line,which leads to the appearance of eigen-line in ultrasonic images.关键词
聚乙烯管/冷焊/特征线/微米压痕/弹性模量Key words
polyethylene pipe/cold welding/eigen-line/microindentation/elastic modulus分类
机械制造引用本文复制引用
聂新宇,鲁顺利,施建峰,郑津洋..聚乙烯管接头特征线弹性模量的微米压痕表征[J].压力容器,2017,34(2):8-13,6.基金项目
国家自然科学基金(51575480,51305394) （51575480,51305394）
