Replica법에 의한 X20CrMoV12.1강 용접부의 비파괴 평가

강계명; 최종운; Kae Myung Kang; Jong Un Choi

Korean Journal of Materials Research, Vol.14, No.1, 78-82, January, 2004

DOI10.3740/MRSK.2004.14.1.078 Export Citation

Replica법에 의한 X20CrMoV12.1강 용접부의 비파괴 평가

Nondestructive Evaluation of X20CrMoV12.1 Steel Weldment by Replica Method

강계명 ^†, 최종운

서울산업대학교 신소재공학과

Kae Myung Kang^†, and Jong Un Choi

Department of Materials Science and Engineering, Seoul National University of Technology, Seoul, 139-743, Korea

E-mail:

In this study, the degree of creep damages on the weldment accelerated creep degradation was nondestructively evaluated by replica method. The frequency of creep cavities occurrence has been observed highly at the intercritical HAZ. The life fraction of weldment damaged by creep has shown from 0.25(damage grade: 2) to 0.75(damage grade: 4) when it reptured. The degree of creep damages is considered to be evaluated by the metallographic replica method which is one of nondestructive evaluation methods.

Keywords:creep damages;replica method;weldment;HAZ

[References]

Hong SH, Kim KS, Journal of The Korea Welding Society, 16(4), 1 (1998)
Jung SH, Journal of The Korea Welding Society, 13(2), 1 (1995)
Ha JS, KRC-93G-S05, 11-50 (1994) (1994)
Lee HM, KRISS-98-081-ET, 1-63 (1998) (1998)
Kim KY, Journal of the Korean Society for Nondestructive Testing, 19(2), 129 (1994)
Bojinov V, Scandinavian Journal of Metallurgy, 214 (1989)
Kussmaul K, Steel Research, 62(2), 83 (1991)
Kussmaul K, Nucl. Eng. Des., 72(1), 1 (1982)
ASTM E139, Standard Practice for Conducting Creep Creep-Rupture and Stress-Rupture Tests of Metallic Materials, (1983) (1983)
KALWA G, Nucl. Eng. Des., 84(2), 87 (1985)
ASTM E1351, Standard Practice for Production and Evaluation of Field Metallographic Replicas, (1990) (1990)
Un KB, KRISS-SRG-9402, 3-85, 95-127 (1994) (1994)

[Related Articles]

[1] Hong SH, Kim KS, Journal of The Korea Welding Society, 16(4), 1 (1998)

[2] Jung SH, Journal of The Korea Welding Society, 13(2), 1 (1995)

[3] Ha JS, KRC-93G-S05, 11-50 (1994) (1994)

[4] Lee HM, KRISS-98-081-ET, 1-63 (1998) (1998)

[5] Kim KY, Journal of the Korean Society for Nondestructive Testing, 19(2), 129 (1994)

[6] Bojinov V, Scandinavian Journal of Metallurgy, 214 (1989)

[7] Kussmaul K, Steel Research, 62(2), 83 (1991)

[8] Kussmaul K, Nucl. Eng. Des., 72(1), 1 (1982)

[9] ASTM E139, Standard Practice for Conducting Creep Creep-Rupture and Stress-Rupture Tests of Metallic Materials, (1983) (1983)

[10] KALWA G, Nucl. Eng. Des., 84(2), 87 (1985)

[11] ASTM E1351, Standard Practice for Production and Evaluation of Field Metallographic Replicas, (1990) (1990)

[12] Un KB, KRISS-SRG-9402, 3-85, 95-127 (1994) (1994)