Microstructure evolution and impact fracture behaviors of Z3CN20-09M stainless steels after long-term thermal aging

2013 ◽  
Vol 433 (1-3) ◽  
pp. 41-49 ◽  
Author(s):  
S.L. Li ◽  
Y.L. Wang ◽  
H.L. Zhang ◽  
S.X. Li ◽  
K. Zheng ◽  
...  
Keyword(s):  
Microstructure Evolution ◽  
Stainless Steels ◽  
Thermal Aging ◽  
Impact Fracture ◽  
Fracture Behaviors

Microstructure evolution in Alloy 617 B after a long-term creep and thermal aging at 700 °C

2018 ◽  
Vol 711 ◽  
pp. 165-174 ◽  
Author(s):  
Magdalena Speicher ◽  
Florian Kauffmann ◽  
Jae-Hyeok Shim ◽  
Mahesh Chandran
Keyword(s):  
Microstructure Evolution ◽  
Thermal Aging ◽  
Alloy 617 ◽  
Term Creep

Effects of long-term thermal aging on bulk and local mechanical behavior of ferritic-austenitic duplex stainless steels

2018 ◽  
Vol 720 ◽  
pp. 130-139 ◽  
Author(s):  
Samuel C. Schwarm ◽  
Sarah Mburu ◽  
R. Prakash Kolli ◽  
Daniel E. Perea ◽  
Sreeramamurthy Ankem
Keyword(s):  
Mechanical Behavior ◽  
Stainless Steels ◽  
Thermal Aging ◽  
Duplex Stainless Steels

Prediction Method of Tensile Properties and Fracture Toughness of Thermal Aged Cast Duplex Stainless Steel Piping

2005 ◽  
Author(s):  
Seiichi Kawaguchi ◽  
Takeharu Nagasaki ◽  
Koji Koyama
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Stainless Steels ◽  
Thermal Aging ◽  
Power Plants ◽  
True Strain ◽  
Prediction Method ◽  
Strain Curve ◽  
Duplex Stainless Steels

Cast duplex stainless steels of CF8M and CF8 are used in major components because of their superior characteristics, such as corrosion resistance, weldability, and so on. However, these stainless steels are known to have tendency of thermal aging embrittlement after long term service. Therefore, the mechanical properties have been investigated using tensile test specimens and fracture toughness specimens aged at 300 to 450°C for up to 40,000 hours. From the results, the effects of thermal aging on the mechanical properties of these cast duplex stainless steels were identified. The true stress-true strain curve prediction method (TSS model) and fracture toughness prediction method (H3T model) after long term service were established. These prediction methods are used for the evaluation on the plant life management of nuclear power plants in Japan.

scholarly journals In Situ Observation of the Deformation and Fracture Behaviors of Long-Term Thermally Aged Cast Duplex Stainless Steels

Metals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 258 ◽  
Author(s):  
Shilei Li ◽  
Yanli Wang ◽  
Xitao Wang
Keyword(s):  
Thermal Aging ◽  
Critical Value ◽  
Tensile Fracture ◽  
In Situ Observation ◽  
Loading Direction ◽  
Deformation And Fracture ◽  
Fracture Behaviors ◽  
Initial Cracks

Cast duplex stainless steel (CDSS) components suffer embrittlement after long-term thermal aging. The deformation and fracture behaviors of un-aged and thermally aged (at 400 °C for 20,000 h) CDSS were investigated using in situ scanning electron microscopy (SEM). The tensile strength of CDSS had a small increase, and the tensile fracture changed from ductile to brittle after thermal aging. Observations using in situ SEM indicated that the initial cracks appeared in the ferrite perpendicular to the loading direction after the macroscopic stress exceeded a critical value. The premature fracture of ferrite grains caused stress on the phase boundaries, leading the cracks to grow into austenite. The cleavage fracture of ferrite accelerated the shearing of austenite and reduced the plasticity of the thermally aged CDSS.

scholarly journals Degradation of impact toughness in cast stainless steels during long-term thermal aging

2020 ◽  
Vol 542 ◽  
pp. 152524
Author(s):  
Thak Sang Byun ◽  
David A. Collins ◽  
Timothy G. Lach ◽  
Emily L. Carter
Keyword(s):  
Impact Toughness ◽  
Stainless Steels ◽  
Thermal Aging
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