Mechanical properties and eddy current testing of thermally aged Z3CN20.09M cast duplex stainless steel

摘要

To study the thermal aging embrittlement of Z3CN20.09M duplex stainless steel produced in China, accelerated thermal aging experiments were carried out at 380 degrees C up to 9000 h. Microhardness measurements, Charpy impact and eddy current tests were performed on aged samples to characterize their thermal aging embrittlement. The results showed that the signal amplitude of eddy current decreased with the increase in aging time. Two quantitative correlations of the eddy current signal amplitude with both the Charpy impact energy, and the Vickers microhardness of the ferrite phase are obtained. The study showed that eddy current testing could be used to non- destructively evaluate the thermal aging embrittlement of cast duplex stainless steels. (C) 2018 Elsevier B.V. All rights reserved.