Microstructure and Mechanical Properties of Welded Joints of Cr18Ni30Mo2Al3Nb Alloy

Rui Luo; Xiao Nong Cheng; Gui Fang Xu; Dong Sheng Li; Shun Guo; Qi Zheng; Cheng Wang; Nan Zhang

doi:10.4028/www.scientific.net/KEM.636.89

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 636Microstructure and Mechanical Properties of Welded...

Microstructure and Mechanical Properties of Welded Joints of Cr18Ni30Mo2Al3Nb Alloy

Abstract:

In this present study, A comparative research on the mechanical properties of the dissimilar welded joints of 800H and Cr18Ni30Mo2Al3Nb was investigated. Butt joints were made using argon tungsten-arc welding (TIG). The TIG joint was made using well established welding parameters (i.e., current ampere of 110~120A, welding rate of 105~115mm/min, argon flow 8~10L/min and voltage of 12V). Mechanical behavior of joints was evaluated by room temperature and high temperature (650°C) tensile testing, and hardness testing, respectively. The microstructure of joint was characterized via optical microscopy, and the morphology of tensile fracture was observed by scaning electron microscopy. As can be seen from the experimental results, clearly shown that Cr18Ni30Mo2Al3Nb has better mechanical performance of welded joint than 800H.

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Periodical:

Key Engineering Materials (Volume 636)

Pages:

89-92

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.636.89

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Online since:

December 2014

Authors:

Rui Luo, Xiao Nong Cheng*, Gui Fang Xu, Dong Sheng Li, Shun Guo, Qi Zheng, Cheng Wang, Nan Zhang

Keywords:

Fe-Cr-Ni Alloy, Mechanical Property, Microstructure, Nuclear Power, Welding

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