Magnetic Evaluation of Heat-Resistant Martensitic Steel Subjected to Microstructure Degradation

Li, Yi1,2; Sun, Chao2; Liu, Kai2; Xu, Tong2; He, Binbin1

2022-07-01

10.3390/ma15144865

MATERIALS   影响因子和分区

1996-1944

The present paper investigates the use of the magnetic hysteresis loop technique to nondestructively evaluate microstructural degradation in heat-resistant martensitic (HRM) steels. The degradation impairs the safe operation of thermal power plants and it is thus essential to periodically assess it using nondestructive evaluation (NDE) techniques. In this contribution, HRM steels are thermally aged up to 16,000 h at 675 degrees C to simulate the microstructural degradation, then the changes in the magnetic coercivity, hardness, and microstructure are systematically characterized and the relations between them are determined. Both coercivity and hardness decrease with thermal aging duration, which can be interpreted in terms of the microstructure parameters' evolution based on the pinning of crystal defects on domain walls and dislocations. Coercivity and hardness share the same softening trend with aging time, and good linear relations between coercivity, hardness, and microstructure parameters are found. These results provide a key to understanding the magnetic parameter evolution in HRM steels and suggest the possibility of using magnetic technologies for the NDE of microstructure degradation in thermal power plants.

microstructure degradation coercivity hysteresis loop heat-resistant steel

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China[U52071173] ; Science and Technology Innovation Commission of Shenzhen["JCYJ20210324120209026","ZDSYS20200810171201007","KQTD2019092917250571"] ; Science and Technology Project of General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China[2017QK101]

Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics

Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Physics, Applied ; Physics, Condensed Matter

WOS:000831376600001

MDPI

20223712707750

Domain walls ; Hardness ; Hysteresis ; Hysteresis loops ; Magnetic materials ; Magnetism ; Martensitic stainless steel ; Nondestructive examination ; Thermal aging ; Thermoelectric power plants

Steel:545.3 ; Thermoelectric Energy:615.4 ; Magnetism: Basic Concepts and Phenomena:701.2 ; Magnetic Materials:708.4 ; Mathematics:921 ; Materials Science:951 ; Systems Science:961

Web of Science

1.Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen 518055, Peoples R China
2.China Special Equipment Inspect & Res Inst, Beijing 100029, Peoples R China

Li, Yi,Sun, Chao,Liu, Kai,et al. Magnetic Evaluation of Heat-Resistant Martensitic Steel Subjected to Microstructure Degradation[J]. MATERIALS,2022,15(14).

Li, Yi,Sun, Chao,Liu, Kai,Xu, Tong,&He, Binbin.(2022).Magnetic Evaluation of Heat-Resistant Martensitic Steel Subjected to Microstructure Degradation.MATERIALS,15(14).

Li, Yi,et al."Magnetic Evaluation of Heat-Resistant Martensitic Steel Subjected to Microstructure Degradation".MATERIALS 15.14(2022).