Measurement of Local Creep Deformation in Cross-Weld Specimen by Optical Fiber Marking and Remote Monitoring-Reference-Cited by-同舟云学术

Measurement of Local Creep Deformation in Cross-Weld Specimen by Optical Fiber Marking and Remote Monitoring

Published:2001-08-02 Issue:1 Volume:124 Page:54-58
ISSN:0094-9930
Container-title:Journal of Pressure Vessel Technology
language:en
Short-container-title:

Author:

Tu Shan-Tung¹,Gong Jian-Ming¹,Ling Xiang¹,He Xiao-Yuan²

Affiliation:

1. Department of Mechanical Engineering, Nanjing University of Technology, Nanjing 210009, China

2. Department of Civil Engineering, Southeast University, Nanjing 210096, China

Abstract

Creep deformation localization is a common occurrence generally found in high temperature components, typically at weldments and geometrical discontinuities. The deformation in a small region cannot be measured by a conventional displacement gage. A new technique for measuring long-term local creep deformation was developed. It uses quartz optical fiber marking, remote monitoring, and image processing. Long-term measurements of the creep deformations of base metal, weld metal, and heat-affected zone in cross-weld specimens were performed at high temperature, which verify the new technique. Strain distributions and evolutions in the weldments are obtained.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Safety, Risk, Reliability and Quality

Link

http://asmedigitalcollection.asme.org/pressurevesseltech/article-pdf/124/1/54/5674998/54_1.pdf

Reference10 articles.

1. Tu, S. T., and Sandstrom, R., 1994, “Evaluation of Weldment Creep Strength Reduction Factors by Experimental and Numerical Simulation,” Int. J. Pressure Vessels Piping, 57, pp. 335–344.

2. ASTM, 1997, “Standard Test Method for Conducting Creep, Creep-Rupture, and Stress-Rupture Tests of Metallic Materials,” ASTM Standard, E 139–96.

3. Tu, S.-T., Gong, J.-M., and Ling, X., 1999, “Mechanical Behavior of Laboratory Cross-Weld Specimen and its Relation with the Practical Cases at Elevated Temperature,” Acta Metall. Sin., 12, pp. 82–88.

4. Xie, H.-M., and Dai, F.-L., 1994, “Experimental Study of Moire´ Method in Application to the Measurement of Metal Creep,” (in Chinese), Mechanical Strength, 16, No. 4, pp. 27–30.

5. Kishimoto, K., and Shinya, N., 1995, “Electron Moire´ Method for Measurement of High Temperature Deformation,” Proc. 2nd Japan-Sino Bilateral Symposium on High Temperature Strength of Materials, Nagaoka, Japan, pp. 71–76.

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