Effect of thermo-mechanical treatment on microstructure and mechanical properties of P92 heat resistant steel

2013 ◽  
Vol 559 ◽  
pp. 882-888 ◽  
Author(s):  
Shengzhi Li ◽  
Zumrat Eliniyaz ◽  
Feng Sun ◽  
Yinzhong Shen ◽  
Lanting Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Treatment ◽  
Resistant Steel ◽  
Heat Resistant Steel ◽  
Heat Resistant ◽  
Microstructure And Mechanical Properties ◽  
Thermo Mechanical Treatment

scholarly journals Effects of Tempering Temperature on the Microstructure and Mechanical Properties of T92 Heat-Resistant Steel

Metals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 194 ◽  
Author(s):  
Dandan Zhao ◽  
Shenghua Zhang ◽  
Hai Zhang ◽  
Shilei Li ◽  
Huifang Xiao ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Yield Strength ◽  
Dominant Factor ◽  
Resistant Steel ◽  
Tempering Temperature ◽  
Heat Resistant Steel ◽  
Heat Resistant ◽  
Microstructure And Mechanical Properties ◽  
Tempering Process

T92 heat-resistant steel is among the most promising candidate materials for structural components in the Generation IV (GEN-IV) reactors. The effects of tempering temperature on the microstructure and mechanical properties of the T92 steel were studied. The microstructural evolution of the T92 steel subjected to various temperatures of the tempering process were investigated using scanning electron microscopy (SEM), transmission electron microscopy (TEM), and synchrotron radiation X-ray diffraction (SR-XRD). The mechanical properties of Vickers hardness, tensile test, and impact test were also investigated. The results showed that the grain size of the prior austenite does not significantly change during the tempering process, while the width of the martensite lath and the size of the carbide precipitates increased with increasing tempering temperature. The hardness and yield strength of the T92 steel decreased, and the plasticity and impact energy increased with increasing tempering temperature. Coarsening of the carbide precipitates during the tempering process was considered to be the dominant factor that reduced the yield strength in the T92 steel.

scholarly journals Microstructure and Mechanical Properties of an Austenitic Heat-Resistant Steel after Service at 570 °C and 25.4 MPa for 18 Years

2021 ◽  
Author(s):  
Xu Yang ◽  
Chengwei Yu ◽  
Xisheng Yang ◽  
Kai Yan ◽  
Gong Qian ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Power Plant ◽  
Impact Toughness ◽  
Grain Boundary ◽  
Resistant Steel ◽  
Heat Resistant Steel ◽  
Heat Resistant ◽  
Microstructure And Mechanical Properties ◽  
The Impact

AbstractMicrostructure and mechanical properties of an austenitic heat-resistant steel (12Cr18Ni12Ti) serviced in a supercritical power plant at 570 °C/25.4 MPa for 160,000 h were investigated. The results show that the hardness and the tensile strength did not decrease; however, the impact toughness was remarkably reduced. The TiC precipitate shows excellent thermostability; for example, it hardly grew up, and no big M23C6 carbides were found. However, large Fe, Cr-rich σ-phase was doomed to precipitate along grain boundary, which should be responsible for the reduced toughness. The growth of σ-phase was observed to have an interaction with the preexisted carbides.

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