A method of extrapolating the long-term strengths of heat-resistant materials

1969 ◽  
Vol 1 (6) ◽  
pp. 592-595 ◽  
Author(s):  
V. I. Kovpak
Keyword(s):  
Heat Resistant

scholarly journals 3D Observation on Precipitates of a Ferritic Heat Resistant Steel after Long-term Creep

Materia Japan ◽  
2018 ◽  
Vol 57 (12) ◽  
pp. 619-619
Author(s):  
Tomoyuki Hatta ◽  
Nobuaki Sekido ◽  
Mitsuharu Yonemura ◽  
Kouichi Maruyama ◽  
Kyosuke Yoshimi
Keyword(s):  
Resistant Steel ◽  
Heat Resistant Steel ◽  
Heat Resistant ◽  
Term Creep

scholarly journals Deterioration of Weldability of Long Term Aged HP Heat-Resistant Cast Steel Containing Nb, Mo and W.

1998 ◽  
Vol 16 (2) ◽  
pp. 223-232 ◽  
Author(s):  
Kenji SHINOZAKI ◽  
Hidenori KUROKI ◽  
Kazutoshi NISHIMOTO ◽  
Masahiro INUI ◽  
Makoto TAKAHASHI
Keyword(s):  
Cast Steel ◽  
Heat Resistant

Novel Concept of Creep Strengthening Mechanism using Grain Boundary Fe2Nb Laves Phase in Austenitic Heat Resistant Steel

2011 ◽  
Vol 1295 ◽  
Author(s):  
Imanuel Tarigan ◽  
Keiichi Kurata ◽  
Naoki Takata ◽  
Takashi Matsuo ◽  
Masao Takeyama
Keyword(s):  
Grain Boundary ◽  
Strengthening Mechanism ◽  
Local Deformation ◽  
Creep Rupture ◽  
Laves Phase ◽  
Resistant Steel ◽  
Heat Resistant Steel ◽  
Heat Resistant ◽  
Term Creep

ABSTRACTThe creep behavior of a new type of austenitic heat-resistant steel Fe-20Cr-30Ni-2Nb (at.%), strengthened by intermetallic Fe2Nb Laves phase, has been examined. Particular attention has been given to the role of grain boundary Laves phase in the strengthening mechanism during long-term creep. The creep resistance increases with increasing area fraction (ρ) of grain boundary Laves phase according to equation ε/ε = (1−ρ), where ε0 is the creep rate at ρ = 0. In addition, the creep rupture life is also extended with increasing ρ without ductility loss, which can yield up to 77% of elongation even at ρ = 89%. Microstructure analysis revealed local deformation and well-developed subgrains formation near the grain boundary free from precipitates, while dislocation pile-ups were observed near the grain boundary Laves phase. Thus, the grain boundary Laves phase is effective in suppressing the local deformation by preventing dislocation motion, and thereby increases the long-term creep rupture strength. This novel creep strengthening mechanism was proposed as “grain boundary precipitation strengthening mechanism” (GBPS).

The mechanisms of scale and subsurface diffusion zone formation of heat-resistant HP40NbTi alloy at long-term high-temperature exposure

Materialia ◽  
2019 ◽  
Vol 7 ◽  
pp. 100427
Author(s):  
Sergey Yu. Kondrat'ev ◽  
Grigoriy P. Anastasiadi ◽  
Alina V. Ptashnik ◽  
Sergey N. Petrov
Keyword(s):  
High Temperature ◽  
Diffusion Zone ◽  
Zone Formation ◽  
High Temperature Exposure ◽  
Heat Resistant ◽  
Temperature Exposure

Long-term strength of heat-resistant steels under creep conditions

1980 ◽  
Vol 22 (12) ◽  
pp. 889-892
Author(s):  
V. F. Zlepko ◽  
M. M. Melamed ◽  
T. A. Shvetsova
Keyword(s):  
Term Strength ◽  
Heat Resistant ◽  
Heat Resistant Steels
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