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Evaluation of Hot Cracking Susceptibility of Nickel- Based Alloys by The Pvr Test

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Abstract

Due to their good corrosion resistance in high-temperature and wet corrosive environments, nickel-based alloys are widely used as construction materials in the chemical industry, as well as in offshore applications and other energy and environmental technologies. Their outstanding corrosion performance, however, is often accompanied by a limited weldability due to a high hot cracking sensitivity. This paper presents a comparative overview of the hot cracking susceptibility of iron and nickel-based alloys type 1.4958 (alloy 800 H), 2.4663 Q (alloy 617), 2.4816 (alloy 600 H), 2.4856 (alloy 625) and 2.4605 (alloy 59). Hot cracking tests are performed by PVR test (deformation crack test), using GTA-welded externally loaded specimens to rank the hot cracking sensitivity of the base metals. In order to gain further knowledge regarding formation and propagation of the hot cracks, optical microscopy and EDX-analyses were performed. In addition to a ranking of materials and processes, interim results regarding the crack types and the metallurgical causes of cracking are discussed.

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Authors and Affiliations

  1. Institute of Materials and Joining Technology, Otto von Guericke University of Magdeburg, Magdeburg, Germany

    Carolin Fink &  Manuela Zinke

  2. Volkswagen AG, Wolfsburg, Germany

    Daniel Keil

Authors
  1. Carolin Fink
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  2. Manuela Zinke
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  3. Daniel Keil
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Correspondence to Carolin Fink.

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Institute of Materials and Joining Technology, Otto von Guericke University of Magdeburg

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Fink, C., Zinke, M. & Keil, D. Evaluation of Hot Cracking Susceptibility of Nickel- Based Alloys by The Pvr Test. Weld World 56, 37–43 (2012). https://doi.org/10.1007/BF03321363

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