High resolution imaging of martensitic all-weld metal. (19th May 2017)

• Record Type: Journal Article
• Authors: Haslberger, P.; Ernst, W.; Schnitzer, R.
• Is Part Of: Science and technology of welding & joining. Volume 22:Number 4(2017)
• Page Start: 336
• Page End: 342
• Publication Date: 2017-05-19
• Subjects: Filler materials -- weld metal -- toughness -- strength -- microstructure -- martensite -- electron backscatter diffraction -- atom probe tomography; Welding -- Periodicals; Joints (Engineering) -- Periodicals; Surfaces (Technology) -- Periodicals; 671.52
• DOI: 10.1080/13621718.2016.1240980
• Languages: English
• ISSNs: 1743-2936

Abstract

ABSTRACT: Martensitic steel welds show promising results regarding their strength while they may tend to be brittle. As martensite is a quite complex microstructure, high resolution techniques like electron backscatter diffraction (EBSD) and atom probe tomography (APT) are valuable tools for an in-depth characterisation. In this study, the average block size and misorientation distribution of martensitic all-weld samples were evaluated with EBSD. A lower carbon content led to a smaller block size and consequently a higher toughness of the all-weld sample. Furthermore, APT revealed a concentration fluctuation of the main alloying elements and particles with a high carbon content. It is discussed how these methods can be used in the future to design the microstructure to achieve optimum properties.