Thermal Fatigue Resistance of A Carbon-Carbon Composite

1992 ◽  
Vol 270 ◽  
Author(s):  
Q.C. Gu ◽  
T.K. LepistÖ ◽  
P.O. Kettunen
Keyword(s):  
Thermal Cycling ◽  
Surface Treatment ◽  
Fatigue Resistance ◽  
Thermal Fatigue ◽  
Structural Damage ◽  
Bending Strength ◽  
Fiber Surface ◽  
Carbon Composite ◽  
Thermal Cycles ◽  
Thermal Fatigue Resistance

ABSTRACTThermal fatigue resistance of carbon-carbon composites with three different fiber surface treatments is studied in thermal cycles between 100 °C and 1,700 °C up to a number of cycles of 100 in free and restricted expansion conditions. The effects of thermal cycles were studied by SEM paying attention especially to structural damage and interfacial debonding between fibers and matrix. Bending tests subsequent to 10 thermal cycles were used to study the effect of thermal cycling on mechanical properties of the composites. The effect depends on the surface treatment of fibers prior to pyrolization. In some cases, the bending strength decreased due to the thermal cycling, whereas a suitable surface treatment minimized the damaging effect and increased the pseudo-ductility of the composite.

scholarly journals Thermal Fatigue Model of Aluminium Alloy Die Casting H-13 Dies under Thermo-Mechanical Cycle

Mechanika ◽  
2021 ◽  
Vol 27 (5) ◽  
pp. 385-391
Author(s):  
Ghusoon Ridha Mohammed Ali ◽  
Ethar Mohammed Mubarak ◽  
Basim Hussein Abbas
Keyword(s):  
Thermal Cycling ◽  
Fatigue Resistance ◽  
Thermal Fatigue ◽  
Fatigue Behavior ◽  
Die Casting ◽  
Thermal Conditions ◽  
Thermal Fatigue Resistance ◽  
Heating And Cooling ◽  
Mechanical Cycling ◽  
Fatigue Model

In industrial fields, thermal fatigue behavior has recently acquired an important role which is mainly related to the interaction between mechanical and thermal conditions. This paper proposes a thermal fatigue model of H13 tool steel under thermos-mechanical cycles. A test apparatus was used to assess the thermal fatigue resistance of materials to estimate surface crack area when specimens are subjected to thermal cycling. Thermal cycling up to 700°C was used, and crack patterns were examined after 1850, 3000, and 5000 cycles. Temperature distributions were measured at different locations in the test specimens. A model was developed to establish a relationship between mechanical cycling and thermal analysis. From the results, the thermal fatigue resistance was significantly improved over the control parameter after heating and cooling during thermomechanical cycles. The model was applied to determine the best performance and in-service life of die casting tools.

scholarly journals Influence of the Selected Factors on Thermal Fatigue of the ADI in an Aspect of its Suitability as the Material for Metal Moulds

2014 ◽  
Vol 59 (2) ◽  
pp. 693-697
Author(s):  
J. Zych ◽  
J. Wróbel
Keyword(s):  
Fatigue Resistance ◽  
Thermal Fatigue ◽  
Al Alloys ◽  
Resistance Heating ◽  
Cyclic Heating ◽  
Thermal Cycles ◽  
Thermal Fatigue Resistance ◽  
Basic Criterion ◽  
Pressure Die Casting ◽  
Zn Alloys

Abstract The investigation results of the thermal fatigue resistance of two ADI grades (EN-GJS-1200-2 and EN-GJS-800-8) are presented in the paper. Tests were performed on the author’s research stand, by means of the resistance heating of samples acc. L.F. Coffin method. The thermal fatigue resistance is the basic criterion in assessing the material suitability for metal moulds. The maximal temperature (Tmax) of thermal cycles influence on their number, which the sample can withstand before cracking, were estimated. Structure transformations, hardness and strength changes of the austempered ductile iron (ADI) were analysed. It was found, that at cyclic heating to Tmax <500°C, the ADI retains its primary ausferritic structure, even after more than 10.000 thermal cycles. Such ADI behaviour predisposes it to be applied as a material for metal moulds used in the pressure die casting, it means mainly at casting Mg and Zn alloys as well as for small castings of Al alloys.

THERMO-SPAN ALLOY

Alloy Digest ◽  
1994 ◽  
Vol 43 (2) ◽  
Keyword(s):  
Physical Properties ◽  
Tensile Properties ◽  
Fatigue Resistance ◽  
Thermal Fatigue ◽  
Rupture Strength ◽  
Stress Rupture ◽  
Heat Treating ◽  
Thermal Fatigue Resistance ◽  
Stress Rupture Strength

Abstract THERMO-SPAN ALLOY is a precipitation-hardenable superalloy with a low coefficient of expansion combined with tensile and stress-rupture strength. Thermal fatigue resistance is inherent. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on forming and heat treating. Filing Code: FE-105. Producer or source: Carpenter.

The Development of High-Alumina Heat Resisting Alloy Used for Scaleboard

2011 ◽  
Vol 287-290 ◽  
pp. 949-952
Author(s):  
Yong Zhe Fan ◽  
Yu Chen Song ◽  
Rui Na Ma
Keyword(s):  
Oxidation Resistance ◽  
Fatigue Resistance ◽  
Thermal Fatigue ◽  
Abrasion Resistance ◽  
High Alumina ◽  
Thermal Fatigue Resistance ◽  
Dry Quenching

According to the requirement of the pot scaleboard of Coke Dry Quenching, high content of aluminium heat resisting alloy was developed.Through changing the content of carbon,boron and titanium,the best compounding of the heat resisting alloy was Fe-8Al-1B-5Cr-0.3C-0.5Ti.The microstructure of this kind of alloy was observed and analyzed with optical microscope.It also had good performance of oxidation resistance,abrasion resistance and thermal fatigue resistance,it was suitable for using as pot scaleboard of CDQ.

The Microstructure and Properties of Coating from Mo2FeB2 Cermet on Surface of H13 Steel by Reactive Flame Spraying

2010 ◽  
Vol 97-101 ◽  
pp. 1321-1327 ◽  
Author(s):  
Xiao Ping Zhou ◽  
Xin Bin Hu ◽  
Yi Sheng Xu
Keyword(s):  
Wear Resistance ◽  
Fatigue Resistance ◽  
Thermal Fatigue ◽  
Ceramic Coating ◽  
Flame Spraying ◽  
H13 Steel ◽  
Thermal Fatigue Resistance ◽  
Microstructure And Properties ◽  
Cermet Coating ◽  
Ternary Boride

The microstructure and properties of ternary boride ceramic coating prepared by reactive flame spraying on surface of H13 steel are studied as well as the microstructures, microhardness, wear resistance and thermal fatigue resistance of the coating. The results show that the Mo2FeB2 cermet coating by reactive flame spraying has good wear resistance and thermal fatigue resistance and its microhardness can even reach 1200 HV.

A New Method to Study the Thermal Fatigue Resistance of Molybdenum by High Power Laser Irradiation

2012 ◽  
Vol 184-185 ◽  
pp. 1384-1388 ◽  
Author(s):  
Shuai Lu ◽  
Hong Wei Li ◽  
Dun Bo Yu ◽  
Ming Pang ◽  
Bo Wang
Keyword(s):  
Fatigue Resistance ◽  
Thermal Fatigue ◽  
High Power ◽  
Laser Heating ◽  
Fatigue Cracks ◽  
Crack Density ◽  
Scale Production ◽  
High Power Laser ◽  
Power Laser ◽  
Thermal Fatigue Resistance

In single roll rapid quenching molding, especially for the preparation of amorphous ribbons and rare earth permanent magnetic materials, the chilling roll is an extremely important component of the preparation equipment. However, frequent repair of the roll is not conducive to continuous large-scale production because of its poor thermal fatigue resistance. Molybdenum is gradually being used as chilling roll material in some applications, and in the present paper a new approach to study the thermal fatigue resistance of molybdenum is based on laser pulse irradiation on the molybdenum surface. A new designed device effectively prevents the molybdenum to be oxidized during the laser heating test. The experiments of thermal fatigue damage on molybdenum were conducted by the high power laser. The results shows that the fatigue cracks had been propagated in the irradiated region after the specimen was loaded by 200 times pulsed laser heating. There is a greater crack density in the laser heating brim region than in the center of the irradiated region. According to the transgranular mode of crack propagation in the laser heating brim region and intergranular mode in the center of the irradiated region, the maximum stress took place at the intersection region due to the great temperature gradient in the laser heating brim region. Continued basis-oriented experiments are planned, regarding the mechanism of thermal fatigue crack initiation and propagation for chilling roll materials.

Failure prediction of the thermal fatigue resistance of a glass

1976 ◽  
Vol 11 (3) ◽  
pp. 458-464 ◽  
Author(s):  
D. P. H. Hasselman ◽  
R. Badaliance ◽  
K. R. McKinney ◽  
C. H. Kim
Keyword(s):  
Fatigue Resistance ◽  
Thermal Fatigue ◽  
Failure Prediction ◽  
Thermal Fatigue Resistance

Freeze and Thaw and Thermal Fatigue Resistance of LMM Incorporating CNT

2017 ◽  
Author(s):  
Ahmed Abdel-Mohti ◽  
Nathan Craft ◽  
Michael J. Rider ◽  
Jed Marquart ◽  
David Sawyers ◽  
...  
Keyword(s):  
Fatigue Resistance ◽  
Thermal Fatigue ◽  
Thermal Fatigue Resistance ◽  
Freeze And Thaw
Sign in / Sign up

Export Citation Format

Share Document