Transient liquid phase bonding of carbon steel components using Ni-based foils - A comprehensive joint characterization

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:751

Article

Di Luozzo, Nicolas¹  Boudard, Michel²  Fontana, Marcelo¹ 

[1] UBA, INTECIN, Lab Solidos Amorfos, Fac Ingn,CONICET, Paseo Colon 850,C1063ACV, Buenos Aires, DF, Argentina

[2] Univ Grenoble Alpes, CNRS, Grenoble INP, LMGP, F-38000 Grenoble, France

关键词: Transient liquid phase bonding;    Carbon steel;    Amorphous metallic foil;    Phase transformation;    X-ray analysis;   

DOI  :  10.1016/j.msea.2019.02.050

来源: Elsevier

【 摘 要 】

The transient liquid phase bonding (TLPB) process is one of the selected joining technologies to replace threaded connections in solid expandable tubulars. In particular, for expandable hot-rolled seamless carbon steel tubular products using Ni-based amorphous metallic foils as filler material. In this work, a comprehensive mechanical properties and microstructural characterization was carried out in TLP-bonded bars for this base metal/filler material combination. Both the joint and the heat affected zone exhibited a strength which compares well with the base metal, and a ductility in accordance with that which is typically specified for steel arc-welded joints. A coalesced lath-like bainitic microstructure was found at the joint. In addition, and by means of orientation imaging, a parent austenite grain-which is shared by the joint and an adjacent ferrite grain from the base metal-was found, which demonstrates the epitaxial nature of the TLPB solidification process. Also, a cell-block-like structure at ferrite grains next to the joint was detected, due to the plastic deformation developed in tensile-tested samples at room temperature.

【 授权许可】

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