Application of J-Q Fracture Methodology to the Analysis of Thermal-Shock Experiment TSE-5A

2009 ◽  
pp. 501-501-18
Author(s):  
DKM Shum
Keyword(s):  
Thermal Shock ◽  
Shock Experiment

The Limitation of Evaluating Thermal Shock Resistance of Al2O3-SiO2 Refractory by Measuring Strength Loss Rate

2011 ◽  
Vol 295-297 ◽  
pp. 2309-2313
Author(s):  
Xin Liu ◽  
Dian Li Qu ◽  
Zhi Jian Li
Keyword(s):  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Loss Rate ◽  
Strength Loss ◽  
X Ray Diffraction ◽  
Initial State ◽  
X Ray ◽  
Cold Crushing Strength ◽  
Shock Experiment ◽  
Shock Resistance

This paper deeply studied the limitation of evaluating the thermal shock resistance of Al2O3-SiO2 refractory by measuring Strength Loss Rate (SLR). By means of supersonic, X-ray diffraction (XRD), the results were drawn as followed.1)After the thermal shock experiment for mullite based A-S refractory, which were composed by mullite and corundum, the supersonic velocity slowed down as it going through the sample while the cold crushing strength abnormally increased at initial state.2) The strength increased remarkably with the ascending of mullite fraction.3)It is inadequate to evaluate the thermal shock resistance of mullite based A-S refractory by strength loss rate.

KIa Crack Arrest Toughness Assessment Using Thermal Shock on Notched Disks

2004 ◽  
Author(s):  
Me´jido Hajjaj ◽  
Ste´phane Bugat ◽  
Clotilde Berdin ◽  
Philippe Bompard
Keyword(s):  
Crack Propagation ◽  
Thermal Shock ◽  
Static Analysis ◽  
Thermal Analyses ◽  
Crack Arrest ◽  
The Finite Element Method ◽  
Wave Interference ◽  
Shock Experiment ◽  
T Values ◽  
Arrest Toughness

The aim of the study is to validate the KIa-T curve on a thermal shock experiment performed on a notched disk (DTSE) taken from a A533-B type steel. Several experiments have been performed. Non linear thermal analyses were carried out using the finite element method in order to obtain the full thermal field within the specimen during crack propagation. The results obtained are in excellent agreement with the experimental results. The DTSE is also interpretated in static terms to compare the obtained KIa (T) values with the limit curve. Finally, dynamic F.E. simulations allow to estimate the influence of dynamic effects in the DTSE and thus validate the methodology. According to the computations, the crack arrested when dK/da>0 and dKd/da = 0. The comparison between stress intensity factor computed from elastic-static analysis (or dynamic) and RCC-M code demonstrated the conservatism of the approach. Then static analysis is sufficient to analyse the result, since no wave interference with the crack propagation was identified.

The heavy-section steel technology pressurized-thermal-shock experiment, PTSE-1

1986 ◽  
Vol 23 (1) ◽  
pp. 81-97 ◽  
Author(s):  
R.H. Bryan ◽  
B.R. Bass ◽  
J.G. Merkle ◽  
C.E. Pugh ◽  
G.C. Robinson ◽  
...  
Keyword(s):  
Thermal Shock ◽  
Heavy Section ◽  
Steel Technology ◽  
Pressurized Thermal Shock ◽  
Shock Experiment

Thermal Shock Experiment and Simulation of Ceramic/Metal Gradient Thermal Barrier Coating

2007 ◽  
Vol 336-338 ◽  
pp. 1818-1822
Author(s):  
Jin Sheng Xiao ◽  
Kun Liu ◽  
Wen Hua Zhao ◽  
Wei Biao Fu
Keyword(s):  
Heat Transfer ◽  
Thermal Shock ◽  
Thermal Barrier Coating ◽  
Thermal Stresses ◽  
Initial Temperature ◽  
Thermal Barrier ◽  
Water Spray ◽  
Barrier Coating ◽  
Shock Experiment ◽  
Two Stages

A thermal shock experiment is designed to explore the thermal shock properties of ceramic/metal gradient thermal barrier coating. The specimens are heated up by oxygen-acetylene flame and cooled by water spray. The experiment procedure includes two stages, heating the specimen from the initial temperature 30°C for 40s, and then cooling for 20s. The heat transfer and the associated thermal stresses produced during the thermal shock procedure are simulated by finite element method. Experimental results indicated that the specimen of gradient coating behaves better in thermal shock experiments, which agree with the results of simulation.

Preparation and Characterization of Nickel-Based Composites Coatings Reinforced by TiB2+WC on Stainless Steel by Laser Cladding

2008 ◽  
Vol 373-374 ◽  
pp. 412-415
Author(s):  
Jun Li ◽  
Wen Ge Li ◽  
Guang Jun Zhang
Keyword(s):  
Stainless Steel ◽  
Thermal Shock ◽  
Laser Cladding ◽  
Scanning Rate ◽  
White Phase ◽  
Shock Experiment ◽  
Metallurgical Bond ◽  
Tib2 Particles

The preparation and characterization of a nickel-based composite coating reinforced by TiB2 particles produced in situ and WC particles on stainless steel by laser cladding have been investigated. The experiment results show that the coating obtained at suitable parameters epitaxially grows from the substrate. The coating is mainly composed of γ-Ni dendrite and dispersed TiB2 and WC particles. In the upper part of the coating, the white phase dispersed in the coatings is mainly fine batt-shaped TiB2 particles. In the middle and bottom parts of the coating, the white phase is mainly composed of comparatively coarse equiaxial WC particles, only an small amount of fine TiB2 particles are present. The different distribution of TiB2 and WC should be attributed to the density difference of TiB2, WC and Ni-based alloys and the comparatively slow scanning rate. No cracks were observed throughout the whole coating, especially in the interface, after the coating was deal with by the thermal shock experiment, which shows that the coating processes a good metallurgical bond with the substrate and the high cracking resistance.

Application of Crack Arrest Theory to a Thermal Shock Experiment

2009 ◽  
pp. 392-392-30 ◽  
Author(s):  
RD Cheverton ◽  
PC Gehlen ◽  
GT Hahn ◽  
SK Iskander
Keyword(s):  
Thermal Shock ◽  
Crack Arrest ◽  
Shock Experiment
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