Journal
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
Volume 238, Issue -, Pages 423-430Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jmatprotec.2016.08.001
Keywords
316L austenitic stainless steel; Underwater wet welding; Flux-cored wire; Microstructure; Mechanical properties
Funding
- Weihai Science and Technology Program [2012DXGJ05]
- State Key Development Program for Basic Research of China [2013CB035502]
- Shandong Provincial Science and Technology Development Plan [2014GGX103033]
- Postdoctoral Science Foundation of China [2014M561343]
- State Education Ministry Scientific Research Foundation for the Returned Overseas Chinese Scholars
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Underwater wet welding of 316L stainless steel was performed with specially designed nickel-based tubular wire at shallow water. Microstructural observations showed that fully austenitic weld metal without cracks and pores was achieved by the nickel-base filler materials. The ultimate tensile strength of welded joints was 508 MPa and the average elongation of the joints was up to 32%. The impact test results indicated that all specimens exhibited ductile fracture and Charpy impact toughness value of weld metal at 0 degrees C was 159 J/cm(2). The average hardness of weld metal was 156 HV. There was a sharp increase of hardness occurred in fusion zone due to more ferrite formation. (C) 2016 Elsevier B.V. All rights reserved.
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