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Title: Investigation of Interfacial Layer for Friction Stir Scribe Welded Aluminum to Steel Joints

Abstract

Friction stir scribe (FSS) welding as a recent derivative of friction stir welding has successfully fabricated a linear joint between automotive Al and steel sheets. However, there is a lack of understanding on its bonding mechanism. In this paper, the microstructures and phases at the bonding interface of FSS welded Al to ultra-high strength steel joints were studied using scanning electron microscopy and transmission electron microscopy. Based on the microstructural analysis, it is found that both mechanical and chemical bonding occurred simultaneously, and the energy-dispersive X-ray spectroscopy revealed that a thin intermetallic compound (IMC) layer was formed at the interface. Owing to the varied material flow and heat generation, the IMC layer thickness gradually decreased from the advancing side to the retreating side, and two IMCs (i.e. Fe2Al5 and Fe4Al13) were confirmed in different weld regions using diffraction pattern (or 1D fast Fourier transform pattern). Also, a Fe/Al solid solution was noticed in the IMC layer, and several Al fringes were found in the Fe-rich side in the scribe stir zone.

Authors:
 [1];  [2];  [1];  [1];  [3];  [2]
  1. Pennsylvania State University
  2. BATTELLE (PACIFIC NW LAB)
  3. Oak Ridge National Laboratory
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1572663
Report Number(s):
PNNL-SA-131371
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Journal of Manufacturing Science and Engineering
Additional Journal Information:
Journal Volume: 140; Journal Issue: 11
Country of Publication:
United States
Language:
English
Subject:
friction stir scribe welding, interfacial layer, interlocking

Citation Formats

Wang, Kaifeng, Upadhyay, Piyush, Wang, Yuxiang, Li, Jingjing, Sun, Xin, and Roosendaal, Timothy J. Investigation of Interfacial Layer for Friction Stir Scribe Welded Aluminum to Steel Joints. United States: N. p., 2018. Web. doi:10.1115/1.4040873.
Wang, Kaifeng, Upadhyay, Piyush, Wang, Yuxiang, Li, Jingjing, Sun, Xin, & Roosendaal, Timothy J. Investigation of Interfacial Layer for Friction Stir Scribe Welded Aluminum to Steel Joints. United States. doi:10.1115/1.4040873.
Wang, Kaifeng, Upadhyay, Piyush, Wang, Yuxiang, Li, Jingjing, Sun, Xin, and Roosendaal, Timothy J. Thu . "Investigation of Interfacial Layer for Friction Stir Scribe Welded Aluminum to Steel Joints". United States. doi:10.1115/1.4040873.
@article{osti_1572663,
title = {Investigation of Interfacial Layer for Friction Stir Scribe Welded Aluminum to Steel Joints},
author = {Wang, Kaifeng and Upadhyay, Piyush and Wang, Yuxiang and Li, Jingjing and Sun, Xin and Roosendaal, Timothy J.},
abstractNote = {Friction stir scribe (FSS) welding as a recent derivative of friction stir welding has successfully fabricated a linear joint between automotive Al and steel sheets. However, there is a lack of understanding on its bonding mechanism. In this paper, the microstructures and phases at the bonding interface of FSS welded Al to ultra-high strength steel joints were studied using scanning electron microscopy and transmission electron microscopy. Based on the microstructural analysis, it is found that both mechanical and chemical bonding occurred simultaneously, and the energy-dispersive X-ray spectroscopy revealed that a thin intermetallic compound (IMC) layer was formed at the interface. Owing to the varied material flow and heat generation, the IMC layer thickness gradually decreased from the advancing side to the retreating side, and two IMCs (i.e. Fe2Al5 and Fe4Al13) were confirmed in different weld regions using diffraction pattern (or 1D fast Fourier transform pattern). Also, a Fe/Al solid solution was noticed in the IMC layer, and several Al fringes were found in the Fe-rich side in the scribe stir zone.},
doi = {10.1115/1.4040873},
journal = {Journal of Manufacturing Science and Engineering},
number = 11,
volume = 140,
place = {United States},
year = {2018},
month = {11}
}

Works referenced in this record:

Recent development in aluminium alloys for the automotive industry
journal, March 2000


Joining of dissimilar materials
journal, January 2015


Characterization of Aluminum/Steel Lap Joint by Friction Stir Welding
journal, February 2005

  • Elrefaey, A.; Gouda, M.; Takahashi, M.
  • Journal of Materials Engineering and Performance, Vol. 14, Issue 1
  • DOI: 10.1361/10599490522310

Dissimilar friction stir welding of 6061 Al to 316 stainless steel using Zn as a filler metal
journal, November 2016


Role of welding parameters on interfacial bonding in dissimilar steel/aluminum friction stir welds
journal, June 2015

  • Shen, Z.; Chen, Y.; Haghshenas, M.
  • Engineering Science and Technology, an International Journal, Vol. 18, Issue 2
  • DOI: 10.1016/j.jestch.2014.12.008

Influence of welding parameters on intermetallic compounds formation in dissimilar steel/aluminum friction stir welds
journal, August 2017


Effects of Process Parameters on Friction Stir Spot Welding of Aluminum Alloy to Advanced High-Strength Steel
journal, May 2017

  • Chen, Kai; Liu, Xun; Ni, Jun
  • Journal of Manufacturing Science and Engineering, Vol. 139, Issue 8
  • DOI: 10.1115/1.4036225

Effect of tool travel and rotation speeds on weld zone defects and joint strength of aluminium steel lap joints made by friction stir welding
journal, February 2012

  • Movahedi, M.; Kokabi, A. H.; Reihani, S. M. Seyed
  • Science and Technology of Welding and Joining, Vol. 17, Issue 2
  • DOI: 10.1179/1362171811Y.0000000092

Thermal Modeling of Al-Al and Al-Steel Friction Stir Spot Welding
journal, July 2016

  • Jedrasiak, P.; Shercliff, H. R.; Reilly, A.
  • Journal of Materials Engineering and Performance, Vol. 25, Issue 9
  • DOI: 10.1007/s11665-016-2225-y

Computational Fluid Dynamics Modeling on Steady-State Friction Stir Welding of Aluminum Alloy 6061 to TRIP Steel
journal, November 2016

  • Liu, Xun; Chen, Gaoqiang; Ni, Jun
  • Journal of Manufacturing Science and Engineering, Vol. 139, Issue 5
  • DOI: 10.1115/1.4034895

Thermal Mechanical Modeling of the Plunge Stage During Friction-Stir Welding of Dissimilar Al 6061 to TRIP 780 Steel
journal, September 2015

  • Liu, Xun; Lan, Shuhuai; Ni, Jun
  • Journal of Manufacturing Science and Engineering, Vol. 137, Issue 5
  • DOI: 10.1115/1.4031188

An assessment of the entire Al–Fe system including D03 ordering
journal, June 2009


Joining Dissimilar Materials Using Friction Stir Scribe Technique
journal, October 2016

  • Upadhyay, Piyush; Hovanski, Yuri; Jana, Saumyadeep
  • Journal of Manufacturing Science and Engineering, Vol. 139, Issue 3
  • DOI: 10.1115/1.4034629

Friction stir scribe welding technique for dissimilar joining of aluminium and galvanised steel
journal, October 2017

  • Wang, Tianhao; Sidhar, Harpreet; Mishra, Rajiv S.
  • Science and Technology of Welding and Joining, Vol. 23, Issue 3
  • DOI: 10.1080/13621718.2017.1381460

An analytical model for the heat generation in friction stir welding
journal, November 2003

  • Schmidt, H.; Hattel, J.; Wert, J.
  • Modelling and Simulation in Materials Science and Engineering, Vol. 12, Issue 1
  • DOI: 10.1088/0965-0393/12/1/013

Friction stir weld nugget temperature asymmetry
journal, January 2010


Effects of forge axis force and backing plate thermal diffusivity on FSW of AA6056
journal, December 2012