In situ Temperature Measurement During Spray Forming of A2-tool Steel and Axisymmetric Two-dimensional Analysis

2000 ◽  
Vol 15 (8) ◽  
pp. 1669-1678 ◽  
Author(s):  
B. C. Moon ◽  
Z. H. Lee ◽  
D. R. White ◽  
E. J. Lavernia
Keyword(s):  
Experimental Data ◽  
Temperature Measurement ◽  
Tool Steel ◽  
Video Camera ◽  
Spray Forming ◽  
Cooling Curve ◽  
Two Dimensional ◽  
Forming Process ◽  
Infrared Video

An in situ temperature measurement was performed during spraying of A2-tool steel, and the results were used to verify an axisymmetric two-dimensional computer simulation program, which was developed for the prediction of shape and temperature variation in a spray-forming process. A thin thermocouple was placed inside of the chamber in advance and brought to the surface of the deposit during spraying. The temperature was then recorded. The surface temperature of the deposit was also measured by an infrared video camera. The emissivity of the surface of A2-tool steel during spraying was determined to be 0.23 through comparison of the temperatures measured by the thermocouple with the ones measured by the infrared video camera. The heat transfer coefficient at the top surface was estimated by comparing the calculated results with the experimental data. The cooling curve predicted on the basis of the numerical simulation showed good agreement with the experimental data.

Dilatometric analysis tool steel X153CrMoV12

2021 ◽  
Vol 16 (1) ◽  
pp. 14-18
Author(s):  
Michal Krbaťa ◽  
◽  
Róbert Cíger ◽  
Keyword(s):  
Experimental Data ◽  
Phase Transformations ◽  
Tool Steel ◽  
High Strength ◽  
Cooling Curve ◽  
Analysis Tool ◽  
Heat Treatment Regime ◽  
Temperature Ranges ◽  
Continuous Cooling Transformation Diagram

The article deals with phase transformations and austenitizing behavior of the X155CrMoV12 tool steel. Dilatation analyses of a series of samples were performed at various cooling rates, chosen in the range from 10 °C·s-1 to 0.1 °C·s-1. Acquired experimental data were used for evaluation of dilatometric curves in order to map the temperature ranges of phase transformations of the austenite to pearlite, bainite or martensite. All experimental samples from dilatometric analyses were then subjected to microstructural analyses and hardness measurements to characterize the microstructure and hardness for every tested heat treatment regime. The second part of this article, entitled "EXPERIMENTAL DETERMINATION OF CONTINUOUS COOLING TRANSFORMATION DIAGRAM FOR HIGH STRENGTH STEEL X153CRMOV12", deals with these analyses of the cooling curve microstructure.

In-Situ, Real Time Diagnostics in the Spray Forming Process

2017 ◽  
pp. 221-263
Author(s):  
Pooya Delshad Khatibi ◽  
Hani Henein ◽  
Udo Fritsching
Keyword(s):  
Real Time ◽  
Spray Forming ◽  
Forming Process

Research on Preparation of Al-Fe-V-Si Alloy Enhanced by In-Situ TiC Particles

2005 ◽  
Vol 475-479 ◽  
pp. 2857-2860
Author(s):  
Bao Hong Zhu ◽  
Yong'an Zhang ◽  
Bai Qing Xiong ◽  
Hong Wei Liu ◽  
Li Kai Shi
Keyword(s):  
Room Temperature ◽  
Volume Fraction ◽  
Hot Extrusion ◽  
Spray Forming ◽  
Forming Process ◽  
Heat Resistant ◽  
Lower Temperature ◽  
In Situ Tic ◽  
Better Than

Heat-resistant Al-Fe-V-Si aluminum alloys enhanced by in-situ TiC particles have been prepared by spray forming process with suitable process parameters. Research results show that the microstructure of as-deposited alloy is fine and homogeneous. In-situ TiC particles prevent the unsteady phases from coming into being. On the other hand, the TiC particles increase the volume fraction of heat-resistant phases. So the mechanical properties of the enhanced alloy by in-situ TiC particles are better than that of Al-Fe-V-Si alloy without TiC particles. The hot extrusion temperature is also an important parameter to understand. Under the permission, it is better to extrude the alloy at lower temperature. The tensile strength of the alloy without TiC particles is about 435MPa at room temperature and is about 204MPa at 350°C. However, when the alloy is enhanced by in-situ TiC particles, the strength of alloy is about 482MPa at room temperature and is about 224MPa at 350°C temperature.

CFD Modelling of Underground Coal Gasification using ANSYS Fluent Simulator

2021 ◽  
Vol 12 (07) ◽  
pp. 505-519
Author(s):  
Devansh Shrivastava
Keyword(s):  
Experimental Data ◽  
Coal Gasification ◽  
Combustion Process ◽  
Two Dimensional ◽  
Underground Coal Gasification ◽  
Cfd Modelling ◽  
Reactor Model ◽  
Ansys Fluent ◽  
In Situ Combustion

Underground Coal Gasification is a non-traditional, in-situ combustion process for converting coal into product gases. In this process coal is combusted and the produced syngas which basically contains CO2, H2, CO and CH4 is extracted to the surface with the help of drilled wells. In this study, with reference to a lab-scaled UCG experiment [1] and taking the experimental data as the basis for the research a two dimensional CFD reactor model was created and further studies were done to establish the activity at the different locations of the reactor.

Effect of TiC Particles on Microstructure and Properties of Al-Fe-V-Si Alloy

2014 ◽  
Vol 543-547 ◽  
pp. 3725-3728
Author(s):  
Rong Hua Zhang ◽  
Biao Wu
Keyword(s):  
Room Temperature ◽  
Volume Fraction ◽  
Hot Extrusion ◽  
Spray Forming ◽  
Forming Process ◽  
Heat Resistant ◽  
Lower Temperature ◽  
In Situ Tic ◽  
Better Than

Heat-resistant Al-Fe-V-Si aluminum alloys enhanced by in-situ TiC particles have been prepared by spray forming process with suitable process parameters. Research results show that the microstructure of as-deposited alloy is fine and homogeneous. In-situ TiC particles prevent the unsteady phases from coming into being. On the other hand, the TiC particles increase the volume fraction of heat-resistant phases. So the mechanical properties of the enhanced alloy by in-situ TiC particles are better than that of Al-Fe-V-Si alloy without TiC particles. The hot extrusion temperature is also an important parameter to understand. Under the permission, it is better to extrude the alloy at lower temperature. The tensile strength of the alloy without TiC particles is about 435MPa at room temperature and is about 204MPa at 350°C. However, when the alloy is enhanced by in-situ TiC particles, the strength of alloy is about 482MPa at room temperature and is about 224MPa at 350°C temperature.

In-situ particle temperature, velocity and size measurements in the spray forming process

2002 ◽  
Vol 326 (1) ◽  
pp. 154-164 ◽  
Author(s):  
Michaela Krauss ◽  
Dirk Bergmann ◽  
Udo Fritsching ◽  
Klaus Bauckhage
Keyword(s):  
Particle Temperature ◽  
Spray Forming ◽  
Forming Process

Modelling of Moisture Movement in Wood during Outdoor Storage

2001 ◽  
Vol 6 (2) ◽  
pp. 3-14 ◽  
Author(s):  
R. Baronas ◽  
F. Ivanauskas ◽  
I. Juodeikienė ◽  
A. Kajalavičius
Keyword(s):  
Experimental Data ◽  
Finite Difference ◽  
Climatic Conditions ◽  
Two Dimensional ◽  
Moisture Movement ◽  
Finite Difference Technique ◽  
Long Term Storage ◽  
Space Formulation ◽  
Term Storage

A model of moisture movement in wood is presented in this paper in a two-dimensional-in-space formulation. The finite-difference technique has been used in order to obtain the solution of the problem. The model was applied to predict the moisture content in sawn boards from pine during long term storage under outdoor climatic conditions. The satisfactory agreement between the numerical solution and experimental data was obtained.

Concomitant induction to few-layer and 1T-rich two-dimensional MoS2 by rigid segment-containing polysulfide as a sulfur source and in situ intercalator

2021 ◽  
Author(s):  
Yijuan Wang ◽  
Jianzhi Wang ◽  
Jie Liu ◽  
Zhuangwei Xiao ◽  
Yanan Xue ◽  
...  
Keyword(s):  
Sulfur Source ◽  
Two Dimensional ◽  
Rigid Segment

A rigid segment-containing polysulfide was used as a sulfur source and in situ intercalator to induce the formation of few-layer and 1T-rich MoS2.

sPreparation of ZrO 2 beads by an improved micro‐droplet spray forming process

2021 ◽  
Author(s):  
Jun Chen ◽  
Wan‐Qing Xue ◽  
Chang‐Ming Xu ◽  
Pai‐Feng Luo ◽  
Ji‐Gui Cheng ◽  
...  
Keyword(s):  
Spray Forming ◽  
Forming Process ◽  
Droplet Spray
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