文献类型：期刊文献

中文题名：Cr-Mo-V钢焊接接头塑性损伤的非线性超声评价

英文题名：Nonlinear ultrasonic evaluation of plastic damage for CrMo-V steel welded joint

作者：李群[1,2];张剑锋[1];项延训[1];轩福贞[1]

机构：[1]承压系统与安全教育部重点实验室机械与动力工程学院华东理工大学,上海200237;[2]中石化宁波工程有限公司,宁波315000

年份：2014

卷号：35

期号：7

起止页码：27

中文期刊名：焊接学报

外文期刊名：Transactions of The China Welding Institution

收录：CSTPCD;;EI(收录号：20143700064049);Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：国家高技术研究发展计划资助项目(863计划2012AA040106);上海市科技启明星计划资助项目(14QA1401200)

语种：中文

中文关键词：焊接;塑性损伤;非线性超声;转子钢

外文关键词：welded joint;;plastic damage;;nonlinear ultrasonic;;Cr-Mo-V steel

摘要：采用非线性超声纵波技术对汽轮机转子钢30Cr2Ni4MoV焊接接头不同程度塑性损伤试样进行了超声非线性信号的检测.结果表明,超声非线性参数随着焊接接头试样塑性应变或损伤的加剧而显著上升;对于同一加载情况下的试样,与母材和热影响区相比,焊缝中心的非线性参数变化最大.同时,利用透射电子显微镜对不同塑性应变焊缝中心微观结构进行观察,发现位错密度的增加是导致非线性参数随着塑性应变增大的主要原因.
Nonlinear ultrasonic was used to inspect different plastic damage specimens of welded joint of steam turbine steel 30Cr2Ni4 MoV. Results show that nonlinear parameter increases clearly with the plastic strain or plastic damage of specimens and the variation of nonlinear parameter of weld center is the maximum,whichis compared with the ones of the heat-affected zone and base metal under the same plastic strain condition.Moreover,it is observed that the dislocation density increases with the plastic strain in the weld center in TEM photographs,which is the primary cause to induce the increase of nonlinear parameter with the growing plastic strain.