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Evaluation of Mechanical Properties of Welded Joints by an Instrumented Indentation Test and Fatigue Life Evaluation  

Goo, Byeong-Choon (한국철도기술연구원)
Lee, Dong-Hyung (한국철도기술연구원)
Kwon, Dong-Il (서울대학교 재료공학부)
Choi, Yeol ((주)프론틱스)
Publication Information
Journal of the Korean Society for Railway / v.7, no.2, 2004 , pp. 142-148 More about this Journal
Abstract
When material properties depend much on positions in a material or it is difficult to make test specimens from a material or component, an instrumented indentation test described in ISO 14577-1, 14577-2 or KS B 0950 can be used to measure material properties and damage. In this study, first of all, the principals of the instrumented indentation test, KS B 0950 are introduced and yield strengths, tensile strengths and work hardening exponents of base materials, heat affected zones and weld materials are measured. In addition, the influence of post-weld heat treatment on the material properties is investigated. Finally the fatigue lift of butt welded specimens are evaluated by the local strain approach. To calculate local strains and stresses, elasto-plastic finite element analysis is conducted using the measured properties.
Keywords
Fatigue life; Instrumented indentation test; Mechanical Properties; Tensile test; Welded Joints;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 F. M. Haggag, 'Nondestructive Determination of Yield Strength and Stress-Strain Curves of In-Services Transmission Pipelines Using Innovative Stress-Strain Microprobe Technology', ATC Report, ATC/DOT/990901
2 J. S. Field, and M. V. Swian, 'Determining the Mechanical Properties of Small Volumes of Material from Submicrometer Spherical Indenter', Journal of Materials Research, Vol.10, pp.101-12, 1995   DOI   ScienceOn
3 W. C. Oliver, and G. M. Pharr, 'An Improved Technique for Determining Hardness and Elastic Modulus Using Load and Displacement Sensing Indentation Experiment', Journal of Materials Research, Vol.7, pp. 1564-83, 1992   DOI
4 F. A. Francis, 'Phenomenological Analysis of Plastic Spherical Indentation', Journal of Engineering Materials and Technology Transaction ASME, Vol.98, pp.272-81, 1976   DOI
5 J. H. Ahn, Y. Choi, and D. Kwon, 'Evaluation of Plastic Flow Properties of Materials Through the Analysis of Indentation Load-Depth Curve', Journal of the Korean Institute of Metal and Materials, Vol.38, pp.1606-11, 2000
6 오창록, 구병춘, 김재훈, 'SM 490 A 맞대기 용접부의 특성 연구', 대한용접학회 추계학술대회 개요집, Vol.41, 제 41권, pp. 204-206, 2003
7 장재일, 최열, 손동일, 이윤희, 권동일, 김정태, 2002, '연속압입시험기법을 이용한 석유화학설비 경년 손상의 새로운 평가 변수 고찰', 대한기계학회논문집 A, 제 26권 제 5호, pp.881-889, 2002
8 US Federal Pipeline Safety Standard 49 CFR 192, Section IID of Appendix B
9 J. H. Ahn, and D. Kwon, 'Derivation of Plastic Stress-Strain Relationship from Ball Indentation: Examination of Strain Definition and Pileup Effect', J. Mater. Res., Vol.16, pp. 3170-78, 2001   DOI   ScienceOn
10 J. P. Kirkwood, M. B. Derek, and P. Collingwood, 'Georgian Pipeline Company Uprating An Old Russian Pipeline', PII Total Integrity Conference, Prague, May 20-22, 2002
11 KS B 0950-2002, 금속재료의 계장화 압입시험-압입 인장 물성평가
12 M. L. Roessle,, A. Fatemi, 'Strain-controlled fatigue properties of steels and some simple approximations', International journal of fatigue, Vol.22, No.6, pp.495-511, 2000   DOI   ScienceOn
13 A. L. Norbury, and T. Samuel, 'The Recovery and Sinking-In or Piling-Up of Material in the Brinell Test, and the Effects of These Factors on the Correlation of the Brinell With Certain Other Hardness Tests', Journal of Iron and Steel Institute, Vol.117, pp.673-87, 1928
14 Y. Choi, J. I. Jang, J. Park, D. I. Kwon, M. Gao, R. Kania, 'Tests proveindentation technique for assessment of in-service Line Pipe', Oil & Gas Journal, Oct. 13, pp.66-71, 2003