Evaluation of Weld Filler Alloying Concepts for Residual Stress Engineering by Means of Neutron and X-Ray Diffraction

Abstract:

Novel Low Transformation Temperature (LTT-) filler materials are specially designed for controlling residual stresses by means of adjusted martensite formation already during welding. Different alloying concepts compete for maximum stress reduction. Two newly developed LTT-alloys were evaluated concerning their potential for residual stress control. For this purpose residual stresses were determined in the surface and also in sub-surface areas of welded joints using X-ray diffraction and Neutron diffraction taking into account local variations of the unstrained lattice parameter.

• Periodical: Advanced Materials Research (Volume 996)
• Pages: 469-474
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.996.469
• Online since: August 2014
• Authors: Arne Kromm*
• Keywords: LTT, Martensite, Weld Filler Materials

References

[1] H. Wohlfahrt, E. Macherauch, Die Ursachen des Schweißeigenspannungszustandes. Materialprüfung 19 (1977) 272-280. (In German).

DOI: 10.1515/mt-1977-190802

[2] T, Nitschke-Pagel, H. Wohlfahrt, Residual Stresses in Welded Joints - Sources and Consequences, Mater. Sci. Forum 404-407 (2002) 215-226.

DOI: 10.4028/www.scientific.net/msf.404-407.215

[3] H.K.D.H. Bhadeshia, Developments in Martensitic and Bainitic Steels: Role of the Shape Deformation, Mater. Sci. Eng. A378 (2004) 34-39.

[4] A. Ohta, O. Watanabe, K. Matsuoka, C. Shiga, S. Nishijima, Y. Maeda, N. Suzuki, T. Kubo, Fatigue Strength improvement by using newly developed low transformation temperature welding material, Welding in the World 43 (1999) 38-42.

DOI: 10.1080/09507110009549271

[5] F. Martinez Diez, Development of Compressive Residual Stress in Structural Steel Weld Toes by Means of Weld Metal Phase Transformations, Welding in the World 52 (2008) 63-78.

DOI: 10.1007/bf03266655

[6] J. Gibmeier, E. Obelode, J. Altenkirch, A. Kromm, T. Kannengiesser, Residual stress in steel fusion welds joined using low transformation temperature (LTT) filler material, Mater. Sci. Forum 768-769 (2014) 620-627.

DOI: 10.4028/www.scientific.net/msf.768-769.620

[7] C. Shiga, H.Y. Yasuda, K. Hiraoka, H. Suzuki, Effect of Ms temperature on residual stress in welded joints of high- strength steels, Welding in the World 54 (2010) 71-79.

DOI: 10.1007/bf03263490

[8] D. Thibault, P. Bocher, M. Thomas, M. Gharghouric, M. Côté, Residual stress characterization in low transformation temperature 13%Cr–4%Ni stainless steel weld by neutron diffraction and the contour method, Mater. Sci. Eng. A527 (2010) 6205-6210.

DOI: 10.1016/j.msea.2010.06.035

[9] R.J. Moat, H.J. Stone, A.A. Shirzadi, J.A. Francis, S. Kundu, A.F. Mark, H.K.D.H. Bhadeshia, L. Karlsson, P.J. Withers, Design of weld fillers for mitigation of residual stresses in ferritic and austenitic steel welds, Sci. Technol. Weld. Joi. 16 (2011).

DOI: 10.1179/1362171811y.0000000003

[10] A. Kromm, T. Kannengiesser, J. Altenkirch, J. Gibmeier, Residual Stresses in Multilayer Welds with Different Martensitic Transformation Temperatures Analyzed by High-Energy Synchrotron Diffraction. Mater. Sci. Forum 681 (2011) 37-42.

DOI: 10.4028/www.scientific.net/msf.681.37

[11] E. Macherauch, P. Müller, Das sin²ψ-Verfahren der röntgenographischen Spannungsmessung, Zeitschrift für angewandte Physik 13 (1961) 305-312. (in German).