Precipitation behavior of stainless steel weld overlay cladding exposed to a long-term thermal aging

2018 ◽  
Vol 137 ◽  
pp. 77-83 ◽  
Author(s):  
Xinyuan Cao ◽  
Ping Zhu ◽  
Wei Wang ◽  
Tingguang Liu ◽  
Yonghao Lu ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Thermal Aging ◽  
Steel Weld ◽  
Precipitation Behavior ◽  
Weld Overlay ◽  
Stainless Steel Weld

Assessment of Thermal Aging of Austenitic Stainless Steel Weld Metal by Using the Double Loop Electrochemical Potentiokinetic Reactivation Technique

CORROSION ◽  
10.5006/2902 ◽  
2019 ◽  
Vol 75 (4) ◽  
pp. 377-388 ◽  
Author(s):  
Xiaodong Lin ◽  
Qunjia Peng ◽  
En-Hou Han ◽  
Wei Ke
Keyword(s):  
Stainless Steel ◽  
Weld Metal ◽  
Thermal Aging ◽  
Double Loop ◽  
Steel Weld ◽  
Stainless Steel Weld ◽  
Steel Weld Metal ◽  
Electrochemical Potentiokinetic Reactivation ◽  
Stainless Steel Weld Metal ◽  
Epr Test

Double loop electrochemical potentiokinetic reactivation (DL-EPR) was applied to evaluate thermal aging of 308L stainless steel weld metal. It was found that the activation and reactivation peaks of DL-EPR curve were induced by dissolution of austenite and δ-ferrite, respectively. Before saturation of hardness, the linear relationship between reactivation ratio and hardness could be used for assessing the thermal aging-induced hardening. In the following thermal aging process, the reactivation ratio is applicable to assess the occurrence of the saturation of thermal aging-induced hardening. The results demonstrated that the DL-EPR test is applicable to assess the evolution of thermal aging.

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