理化检验-物理分册2016，Vol.52Issue(4)：221-226,230,7.DOI:10.11973/lhjy-wl201604001
介质电导率对直流电压降法测试腐蚀疲劳裂纹长度准确性的影响
Influence of Medium Conductivity on Accuracy of Measuring Fatigue Crack Length by DCPD Method
摘要
Abstract
The effects of high content NaCl solution environment on the accuracy of measuring fatigue crack length by direct current potential drop (DCPD) method were studied.The results show that under the same crack length,the potential drop decreased slightly with the increase of NaCl content in the solution.The DCPD signal obtained in different solutions changed within ±0.2%.Higher NaCl content resulted in larger deviation between the tested crack length and the actual crack length.But all the deviations were within the allowed error range.Fatigue crack growth rate of the Hastelloy C-276 alloy in 0.5%NaCl solution increased by 1.5 times compared to that in pure water,but the crack growth rate changed slowly with the further increase of NaCl content in the solution.关键词
直流电压降法/疲劳裂纹长度/介质电导率/溶质含量Key words
direct current potential drop method/fatigue crack length/medium conductivity/solute content分类
矿业与冶金引用本文复制引用
胡梦,李志军,张乐福..介质电导率对直流电压降法测试腐蚀疲劳裂纹长度准确性的影响[J].理化检验-物理分册,2016,52(4):221-226,230,7.基金项目
国家重点基础研究发展计划(973计划)资助项目(2014CB046701) （973计划）
