scholarly journals 405 In Situ Observation and Damage Mechanics on the Progressive Behavior of High Temperature Creep Damage for TiAl Intermetallic Alloys

2005 ◽  
Vol 2005.40 (0) ◽  
pp. 146-147 ◽  
Author(s):  
Hironori Tsukidate ◽  
A.Toshimitsu Jr. Yokobori
Keyword(s):  
High Temperature ◽  
Damage Mechanics ◽  
Creep Damage ◽  
In Situ Observation ◽  
High Temperature Creep ◽  
Intermetallic Alloys ◽  
Temperature Creep

In Situ Observation of High Temperature Creep Behavior During Annealing of Steel

2012 ◽  
Vol 43 (13) ◽  
pp. 5067-5078 ◽  
Author(s):  
X. F. Zhang ◽  
H. Terasaki ◽  
Y. Komizo ◽  
Y. Murakami ◽  
K. Yasuda
Keyword(s):  
High Temperature ◽  
Creep Behavior ◽  
In Situ Observation ◽  
High Temperature Creep ◽  
Temperature Creep

High Temperature Creep Damage Under Biaxial Loading—Part II: Model and Simulations

1990 ◽  
Vol 112 (4) ◽  
pp. 450-455 ◽  
Author(s):  
F. Trivaudey ◽  
P. Delobelle
Keyword(s):  
High Temperature ◽  
Biaxial Loading ◽  
Creep Damage ◽  
Internal Variables ◽  
Anisotropic Damage ◽  
High Temperature Creep ◽  
Viscoplastic Model ◽  
Temperature Creep ◽  
Complete Formulation ◽  
Damage Law

The inadequacies, in describing the high temperature creep damage of two industrial alloys (Part I) with a model where the anisotropic damage variable D depends only on time have been pointed out. It is therefore proposed to introduce directly strain rate in the damage law. This rule is then integrated into a unified viscoplastic model, with internal variables, that has been developed elsewhere. Some numerical simulations obtained with the complete formulation are reported and, in general, yield acceptable results.

Effect of Variation in Grain Size on High Temperature Creep Test of Fe-Ni-Cr Alloy

2013 ◽  
Vol 845 ◽  
pp. 51-55
Author(s):  
Esah Hamzah ◽  
Maureen Mudang ◽  
Muhammad Adil Khattak
Keyword(s):  
Grain Size ◽  
High Temperature ◽  
Creep Rate ◽  
Creep Damage ◽  
Grain Boundary Sliding ◽  
High Temperature Creep ◽  
Temperature Creep ◽  
Nickel Based Superalloy ◽  
Solution Treated ◽  
Incoloy 800H

Fe-Ni-Cr or known as Incoloy 800H and Haynes HR120 is a solid solution strengthened iron-nickel based superalloy which is extensively used in high temperature and corrosive environment. The effect of grain size in creep strength and creep rate comes through the grain boundary sliding and grain boundaries as barrier mechanism. This paper describes the effect of microstructural variation of Fe-Ni-Cr on the high temperature creep properties. The materials were heat treated at temperature 1050°C and 1200°C followed by water quenching process. The grain size of the samples of Incoloy 800H is 95.47μm for as-received, 122.81μm for solution treated at 1050°C and 380.95μm for solution treated at 1200°C. And the grain size of the samples of Haynes HR120 is 53.45μm for as-received, 61.50μm for solution treated at 1050°C and 158.27μm for solution treated at 1200°C. The creep damage investigation was carried out in the three different grain sizes of Fe-Ni-Cr superalloy at 900°C with stress at 100MPa. Rectangular section forms of specimens are used in the research. In all the tests conducted, the creep curves show primary, secondary and tertiary stages. The creep fracture surface were characterised by using scanning electron microscope. It was found that larger grain size results in lower creep rate for alloy Haynes HR120 but inverse result showed on alloy Incoloy 800H.

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