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Title: Evaluation of intermetallic compound layer at aluminum/steel interface joined by friction stir scribe technology

Journal Article · · Materials & Design
 [1]; ORCiD logo [2];  [2];  [3];  [4];  [5]
  1. Univ. of North Texas, Denton, TX (United States); Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  2. Univ. of North Texas, Denton, TX (United States)
  3. Brigham Young Univ., Provo, UT (United States)
  4. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  5. General Motors Technical Center, Warren, MI (United States)

Heat input and high strain rate deformation during friction stir welding of aluminum and steel resulted in the diffusion-based formation of a FexAly intermetallic compound (IMC) layer. Compared with conventional friction stir welding tools, a friction stir scribe tool can reduce heat input significantly limiting the IMC layer thickness (~100–750 nm). Friction stir scribe joined lap joints fractured either through the welded interface or within the base aluminum alloy on the loading side, depending on IMC layer thickness during tensile lap shear testing. In addition, a modified effective heat of formation model predicted that Al13Fe4 formed first at aluminum/steel interface and, during welding process, was substituted by Al5Fe2 with local silicon enrichment, which was verified via microstructural characterization.

Research Organization:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
NSF-IIP 1157754; AC05-76RL01830
OSTI ID:
1530733
Alternate ID(s):
OSTI ID: 1507548
Report Number(s):
PNNL-SA-142807
Journal Information:
Materials & Design, Vol. 174, Issue C; ISSN 0264-1275
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 47 works
Citation information provided by
Web of Science

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Cited By (2)

Mechanism of intermetallic compound formation during the dissimilar friction stir welding of aluminum and steel journal October 2019
A prediction of Fe-Al IMC layer thickness in TIG-assisted hybrid friction stir welded Al/steel dissimilar joints by numerical analysis journal November 2019

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