Fracture Behaviour of Brazed Soft Martensitic Stainless Steel Joints under Cyclic Loading

Abstract:

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The fracture behaviour of brazed joints of the soft martensitic stainless steel X3CrNiMo13-4 under cyclic loading is investigated. The fatigue crack propagation curves (da/dN-ΔK) were derived for different load ratios R. The fatigue crack threshold values ΔKth were estimated to be 9 MPa m0.5, 7 MPa m0.5, 6 MPa m0.5 and 4 MPa m0.5 for the R values of 0.1, 0.3, 0.5 and 0.7, respectively. In addition, crack growth curves were derived for different constant loads ΔF. The Paris exponent, n, was estimated for the different R values and found to be very high compared to homogeneous materials. The work was completed with microstructural and fractographic investigation by scanning electron microscope (SEM).

Info:

Periodical:

Materials Science Forum (Volumes 636-637)

Edited by:

Luís Guerra ROSA and Fernanda MARGARIDO

Pages:

1490-1495

DOI:

10.4028/www.scientific.net/MSF.636-637.1490

Citation:

T. A. Başer et al., "Fracture Behaviour of Brazed Soft Martensitic Stainless Steel Joints under Cyclic Loading", Materials Science Forum, Vols. 636-637, pp. 1490-1495, 2010

Online since:

January 2010

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$35.00

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