Hot Spot Stress Fatigue Evaluation to Duplex Stainless Steel Welded Joints

Abstract:

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Fatigue strength of duplex stainless steel welded joints with longitudinal fillet welded guess and with longitudinal flat side guess welded on plate was evaluated by hot spot stress, hot spot stress S-N curves were produced and compared with normal stress S-N curves. The results show that the hot spot stress fatigue strength of the two kinds welded joints should be expressed by only single S-N curve while nominal stress S-N curves can only be regressed respectively. The test data are greatly above the S-N curves with slope m=3, recommended by IIW, which indicates that the slope m=3(IIW) has great safety factor in practical engineering application. But there is no appreciable difference in fatigue strength between duplex stainless steel and common structural steel with similar welded joints when fixed the test data to slope m=3.

Info:

Periodical:

Key Engineering Materials (Volumes 324-325)

Edited by:

M.H. Aliabadi, Qingfen Li, Li Li and F.-G. Buchholz

Pages:

779-782

DOI:

10.4028/www.scientific.net/KEM.324-325.779

Citation:

F. Y. Jia et al., "Hot Spot Stress Fatigue Evaluation to Duplex Stainless Steel Welded Joints ", Key Engineering Materials, Vols. 324-325, pp. 779-782, 2006

Online since:

November 2006

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Price:

$35.00

[1] M. Wu: Duplex Stainless Steel. Metallury Industry Publications, Beijing (2000).

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[3] D. Radaj: Design and Analysis of Fatigue Resistant Welded Structures, Machinery Industry Publications, Beijing (1994).

[4] A. Hobbacher: Recommendations for Fatigue Design of Welded Joints and Components, IIW document XIII-1539-96 / XV-845-96, Update June (2002).

DOI: 10.1007/978-3-319-23757-2

[5] E. Niemi: Structural Stress Approach to Fatigue Analysis of Welded Components, IIW document XIII-1819-00/XV-1090-01/XIII-WG3-06-99�Last modified August 11�(2001).

[6] S.J. Maddox: Hot-spot Fatigue Data for Welded Steel and Aluminum as a Basis for Design. IIW document XIII-1900-01.

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