Crack Healing Behavior of 12%Cr Ultra-Super-Critical Rotor Steel

A drilling and compression method was designed to produce samples with artifical inner crack. According to the morphology, two types of crack were defined. After heating and holding at different temperatures, the crack healing results were observed under SEM. The starting temperature of crack healing is between 900°C and 950°C. Pseudo-equilibrium phase diagram of 12%Cr was calculated by the Thermo-Calc software to investigate the influence of transformation on the crack healing. It is found that the diffusive transformation has a positive influence on the crack healing behavior. Through experimental results and analysis, we conclude that crack healing is a physical process in association with diffusion, nucleation and grain growth. Any factor which can accelerate diffusion, nucleation and grain growth rate is favorable for the crack healing.

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Intermetallic Formation in the Aluminum–Copper System

Surface Review and Letters ◽

10.1142/s0218625x03005396 ◽

2003 ◽

Vol 10 (04) ◽

pp. 677-683 ◽

Cited By ~ 20

Author(s):

E. B. Hannech ◽

N. Lamoudi ◽

N. Benslim ◽

B. Makhloufi

Keyword(s):

Electron Microscopy ◽

Phase Diagram ◽

Solid Solution ◽

Intermetallic Layer ◽

Equilibrium Phase ◽

Equilibrium Phase Diagram ◽

Diffusion Couples ◽

Intermetallic Formation ◽

Parabolic Law ◽

Scanning Electron

Intermetallic formation at 425°C in the aluminum–copper system has been studied by scanning electron microscopy using welded diffusion couples. Several Al–Cu phases predicted by the equilibrium phase diagram of the elements and voids taking place in the diffusion zone have been detected in the couples. The predominant phases were found to be Al 2 Cu 3 and the solid solution of Al in Cu, α. The growth of the intermetallic layer obeyed the parabolic law.

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Equilibrium phase diagram of polystyrene and 8CB

Journal of Polymer Science Part B Polymer Physics ◽

10.1002/(sici)1099-0488(19990801)37:15<1841::aid-polb8>3.0.co;2-3 ◽

1999 ◽

Vol 37 (15) ◽

pp. 1841-1848 ◽

Cited By ~ 18

Author(s):

Farida Benmouna ◽

Abdelylah Daoudi ◽

Fr�d�rick Roussel ◽

Jean-Marc Buisine ◽

Xavier Coqueret ◽

...

Keyword(s):

Phase Diagram ◽

Equilibrium Phase ◽

Equilibrium Phase Diagram

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On the recently published Mo-Si equilibrium phase diagram

Journal of Phase Equilibria ◽

10.1007/bf02667799 ◽

1993 ◽

Vol 14 (2) ◽

pp. 136-136

Keyword(s):

Phase Diagram ◽

Equilibrium Phase ◽

Equilibrium Phase Diagram

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Formation of Intermediate Phases and Supersaturated Solid Solution in Al-Cu System during Diffusion

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.383.31 ◽

2018 ◽

Vol 383 ◽

pp. 31-35 ◽

Cited By ~ 2

Author(s):

Alexey Rodin ◽

Nataliya Goreslavets

Keyword(s):

Phase Diagram ◽

Solid Solution ◽

High Temperature ◽

Chemical Composition ◽

Low Temperature ◽

Supersaturated Solid Solution ◽

Diffusion Processes ◽

Equilibrium Phase ◽

Equilibrium Phase Diagram ◽

Intermediate Phases

The study of diffusion processes in the aluminum - copper system was carried out at the temperature 350 and 520 °C. Special attention was paid on the chemical composition of the system near Al/Cu interface. It was determined that the intermediate phases in the system, corresponding to the equilibrium phase diagram, were not formed at low temperature. At high temperature the intermediate phases forms starting with Cu - rich phases. In both cases supersaturated solid solution of copper in aluminum could be observed near the interface.

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