Experimental Study on High Temperature Creep Damage of 1Cr5Mo Steel Based on Magnetic Parameters

2019 ◽  
Vol 795 ◽  
pp. 194-199
Author(s):  
Guang Xing Gao ◽  
Shan Shan Shao ◽  
Gong Tian Shen ◽  
Fa Kun Zhuang ◽  
Zhi Feng Li
Keyword(s):  
High Temperature ◽  
Elevated Temperature ◽  
Engineering Application ◽  
Creep Damage ◽  
Optical Microscope ◽  
Measurement Technology ◽  
High Temperature Creep ◽  
Magnetic Parameters ◽  
Temperature Creep ◽  
Loop Measurement

Aiming at the evaluation of creep damage at elevated temperature of ferromagnetic materials in engineering application, the hysteresis loop measurement technology was adopted to study the creep damage behaviour of 1Cr5Mo steel. The creep testing at 600°C/90MPa of 1Cr5Mo steel were carried out to prepare specimens with various degrees of creep damage. The variation of magnetic parameter including coercivity (HC) and remanence (Br) with creep damage was analyzed. The microstructure evolution of 1Cr5Mo steel with different degrees of creep damage was observed by optical microscope. The results show that the coercivity and remanence show certain regularity with creep damage at elevated temperature. Moreover, the regularity is repeatable which indicates that the measurement technology based on magnetic parameters can be used for the evaluation of high temperature creep damage.

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.

High Temperature Creep Damage Mechanisms in a Directionally Solidified Alloy: Impact of Crystallography and Environment

2016 ◽  
pp. 745-756 ◽  
Author(s):  
L. Mataveli Suave ◽  
L. Mataveli Suave ◽  
J. Cormier ◽  
P. Villechaise ◽  
D. Bertheau ◽  
...  
Keyword(s):  
High Temperature ◽  
Creep Damage ◽  
High Temperature Creep ◽  
Directionally Solidified ◽  
Damage Mechanisms ◽  
Temperature Creep

The estimation of high temperature creep damage around the crack of Cr-Mo-V steel

1994 ◽  
Vol 47 (3) ◽  
pp. 423-429 ◽  
Author(s):  
Fuji Akio ◽  
Yoshida Mitsuhiko ◽  
Yamaoku Toshiaki ◽  
A.Toshimitsu Yokobori
Keyword(s):  
High Temperature ◽  
Creep Damage ◽  
High Temperature Creep ◽  
Temperature Creep

Creep Damage Mechanisms in Cast Cobalt Superalloys for Applications in Glass Industry

2018 ◽  
Vol 774 ◽  
pp. 173-178
Author(s):  
Marie Kvapilová ◽  
Božena Podhorná ◽  
Jiri Dvorak ◽  
Petr Král ◽  
Jiří Zýka ◽  
...  
Keyword(s):  
High Temperature ◽  
Critical Role ◽  
Creep Damage ◽  
Alloy System ◽  
High Temperature Creep ◽  
Precision Casting ◽  
Temperature Creep ◽  
Complex Carbides ◽  
The Matrix ◽  
Damage Processes

Two cast NbC and TaC- strengthened cobalt-base superalloys have been developed for a precision casting of spinner discs for glass wool industry. In the present study, the relationships between the type and morphology of carbides and the degradation processes in both types of cast cobalt-based superalloys subjected to high temperature creep have been examined. It was found that the nature of carbides within the alloy microstructure plays a critical role in determining the creep damage processes and microstructure stability of the alloy system under high temperature creep. The morphology of the carbides is a strong function of their chemical composition. The interface decohesion between the complex carbides and the matrix and cracking of the brittle carbides homogeneously distributed in the crept NbC - strengthened alloy lead to brittle intergranular and/or interdendritic fracture. By contrast, Ta - strengthened alloy exhibited very small extent of isolated creep damage and the final fracture is ductile transgranular mode.

High temperature creep damage in steels and superalloys

1993 ◽  
Vol 64 (8-9) ◽  
pp. 449-453 ◽  
Author(s):  
Keijiro Hiraga ◽  
Rolf Lombard ◽  
Horst Vehoff ◽  
Peter Neumann
Keyword(s):  
High Temperature ◽  
Creep Damage ◽  
High Temperature Creep ◽  
Temperature Creep
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