MATERIAL DEGRADATION CONSULTING May 25 th , 2012 AVIC Beijing Institute of Aeronautical Materials
MATERIAL DEGRADATION CONSULTING Ageing Phenomena: Thermal Ageing H CO [A/cm] HV 10 250 3.5 3.4 240 3.3 230 3.2 3.1 220 3 210 2.9 2.8 200 2.7 190 Analogy between mechanical and magnetic hardness 2.6 180 2.5 1 10 100 1000 10000 Length of service simulation at 400 ° C [h] May 25 th , 2012 AVIC Beijing Institute of Aeronautical Materials
MATERIAL DEGRADATION CONSULTING EXPERIMENT Magnetizing yoke Hall probe + coil s s Sample TENSILE TEST SIGNAL LOAD MEASUREMENT MECHANICS EVALUATION UNIT PC: Modular Measurement System (MMS) LOAD ADJUSTMENT DATA ACQUISITION EVALUATION May 25 th , 2012 AVIC Beijing Institute of Aeronautical Materials
MATERIAL DEGRADATION CONSULTING 215 calibration set Thermally-induced test set embrittlement of WB 205 36 steel predicted HV 5 (3MA) 195 Combined Barkhausen noise, 185 analysis of upper harmonics and eddy current analysis 175 165 Prediction of the Vickers 155 hardness for WB 36 155 165 175 185 195 205 215 actual HV 5 May 25 th , 2012 AVIC Beijing Institute of Aeronautical Materials
MATERIAL DEGRADATION CONSULTING Fractal topography-analysis X6 CrNiTi 18 10 1 dislocation generation 1 2 3 4 5 Microstructure local slip and rotation F 2 ≅ 3D domains 4 3 Cell structure, slip bands 3 Mesostructure I 4 multiple slip bands 2 Mesostructure II ≅ 2D domains 5 End of life 1 Macroscopic cracking log N/N B May 25 th , 2012 AVIC Beijing Institute of Aeronautical Materials
MATERIAL DEGRADATION CONSULTING May 25 th , 2012 AVIC Beijing Institute of Aeronautical Materials
MATERIAL DEGRADATION CONSULTING May 25 th , 2012 AVIC Beijing Institute of Aeronautical Materials
Recommend
More recommend
