scholarly journals Discussion: “Metals at High Temperature—Test Procedure and Analysis of Test Data” (Robinson, Ernest L., 1933, J. Appl. Mech., 1, pp. 145–148)

1933 ◽  
Vol 1 (3) ◽  
pp. 149-149
Author(s):  
S. R. Puffer
Keyword(s):  
High Temperature ◽  
Test Data ◽  
Test Procedure ◽  
Temperature Test

Metals at High Temperature—Test Procedure and Analysis of Test Data

1933 ◽  
Vol 1 (3) ◽  
pp. 145-148
Author(s):  
Ernest L. Robinson
Keyword(s):  
High Temperature ◽  
Applied Stress ◽  
High Temperatures ◽  
Test Data ◽  
Test Procedure ◽  
Test Results ◽  
Allowable Stress ◽  
Actual Service ◽  
Second Year ◽  
Temperature Test

Abstract Tests on the flow of metals at high temperatures under stresses so small that the resulting distortions are less than one-tenth of 1 per cent show, throughout the duration of tests extending into the second year, continued reductions in rates of flow so that, for such small distortions, it is impossible to associate any particular rate of flow with a corresponding allowable stress. A statement of test results, to be of use, requires in addition to rate of flow and applied stress, certainly a record of total extension and possibly also a record of time elapsed. Furthermore, tests should be made under conditions of stress approximating the conditions of application in actual service.

Thermal Hydraulic Studies of a Fluoride Salt Cooled High Temperature Test Reactor With Different CFD Methods

2014 ◽  
Author(s):  
Chenglong Wang ◽  
Yao Xiao ◽  
Jianjun Zhou ◽  
Dalin Zhang ◽  
Suizheng Qiu ◽  
...  
Keyword(s):  
High Temperature ◽  
Channel Model ◽  
Single Channel ◽  
Fluoride Salt ◽  
Applied Physics ◽  
Local Flow ◽  
Single Channel Analysis ◽  
Test Reactor ◽  
Safety Operation ◽  
Temperature Test

The Fluoride-salt-cooled High temperature Reactor (FHR) is new reactor concept-about a decade old which is mainly on going in China and U.S. The preliminary thermal-hydraulic studies of the Fluoride salt cooled High temperature Test Reactor (FHTR) is necessary for the development of the FHR technology. In this paper, the thermal-hydraulics of FHTR (also called TMSR-SF) designed by Shanghai Instituted of Applied Physics (SINAP) is studied in different power modes. The temperature distributions of the coolant and the fuel pebble are obtained using a steady-state thermal-hydraulic analysis code for FHR. The comprehensive local flow and heat transfer are investigated by computational fluid dynamics (CFD) for the locations where may have the maximum pebble temperature based on the results from single channel analysis. The profiles of temperature, velocity, pressure and Nu of the coolant on the surface of the pebble as well as the temperature distribution of a fuel pebble are obtained and analyzed. Numerical results showed that the results of 3-D simulation are in reasonable agreement with that of single channel model and also illustrated safety operation of the preliminary designed TMSR-SF in different power mode.

Effects of Geometry, Temperature, and Test Procedure on Reported Failure Strains From Simulated Wide Plate Tests

2006 ◽  
Author(s):  
Yong-Yi Wang ◽  
Ming Liu ◽  
Yaoshan Chen ◽  
David Horsley
Keyword(s):  
Test Data ◽  
Failure Process ◽  
Test Procedure ◽  
Gage Length ◽  
Tensile Failure ◽  
Temperature Fields ◽  
Weld Strength ◽  
Width Ratio ◽  
Local Cooling ◽  
Linear Variable Displacement Transducer

Wide plate test is a valuable tool in the assessment of pipeline girth weld integrity. It has been used for welding procedure qualification and for the validation of theoretically based defect assessment procedures. Although the general form of the test has remained largely unchanged over the years, the size of the test specimen, strain measurement, and test procedure, has had some variations. The influence of these variables has not been adequately examined. While this might be acceptable for tests targeted for stress-based design in which a general pass/no-pass answer is desired, the requirements for data accuracy and consistency for strain-based design are much higher. Understanding the variability of the test data is critical for high strain applications. This paper examines the effects of test geometry, mainly the length to width ratio, on the reported failure strains, assuming material’s failure process remains the same. The influence of different strain measdurement procedures, such as the location and gage length of LVDTs (Linear Variable Displacement Transducer), is assessed for different materials and weld strength mismatch levels. The other consideration is the influence of temperature fields on the cold test data. The postulated cold tests use either local cooling at the location of the weld defect or uniform cooling. In the case of local cooling, the gage length of the LVDTs covers materials of different temperatures. Consequently the reported failure strains are affected by the distribution of the temperature fields. The effects of the temperature fields on the reported tensile failure strains are examined.

Microphone High-Temperature Test System Development Based on PID Control

2014 ◽  
Vol 912-914 ◽  
pp. 1294-1298
Author(s):  
Li Yan Zhao
Keyword(s):  
High Temperature ◽  
System Development ◽  
Test System ◽  
Lower Efficiency ◽  
Temperature Function ◽  
Control Center ◽  
Marketing Application ◽  
High Temperature Operation ◽  
Very High ◽  
Temperature Test

With PID as its control center, this system overcomes the uncontrol of temperature, lower efficiency, difficult operation and other drawbacks occurring in precious microphone high-temperature test system. Characterized by excellent adaptability, automatic heating and constant temperature function, and simple operation, the high-temperature test system can meet the special requirements during microphone high temperature operation, evaluate the phase, frequency response, background noise and other product indexes in a high temperature ambient, and possess a very high marketing application value.

High Temperature Creep Behavior of Austenitic Fe-Ni-Cr Alloy

2013 ◽  
Vol 686 ◽  
pp. 170-179 ◽  
Author(s):  
Esah Hamzah ◽  
Maureen Mudang ◽  
Ang Khwang Jenq ◽  
Muhammad Adil Khattak
Keyword(s):  
High Temperature ◽  
Detrimental Effect ◽  
Creep Damage ◽  
Transgranular Fracture ◽  
Creep Fracture ◽  
Secondary Stage ◽  
Tertiary Stage ◽  
The Difference ◽  
Temperature Test ◽  
Section Form

Creep damage investigation was carried out in Fe-Ni-Cr alloy at 800°C, 900°C, and 983°C using rectangular section form of specimen. In all the tests conducted on this material, some creep curves showed primary stage, secondary stage and tertiary stage. The creep fracture shows ductile transgranular fracture where separation occurred at the dendrites carbide interface suggesting that the detrimental effect of creep was compounded by precipitation of carbides at matrix. The presence of cavities may be due to the difference in thermal expansion characteristics of the austenite and carbide during high temperature test. Coarsening of carbides lead to cavities formation within the dendrite and carbide interface and form cavities linkage due to formation of crack and finally cause creep fracture. Increase in creep temperature it will lead to increase in creep rate. The fracture modes of creep samples were investigated to predict the failure mode.

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