Foaming behavior of blowing- and stabilization-agent-free aluminum foam precursor during spot friction stir welding

Yoshihiko Hangai; Keisuke Takada; Hidetoshi Fujii; Yasuhiro Aoki; Takao Utsunomiya

doi:10.1016/j.jmatprotec.2018.10.013

Foaming behavior of blowing- and stabilization-agent-free aluminum foam precursor during spot friction stir welding

Yoshihiko Hangai, Keisuke Takada, Hidetoshi Fujii, Yasuhiro Aoki, Takao Utsunomiya

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

ADC12 die-casting precursors containing many gas pores were fabricated by the friction stir welding (FSW) route and were foamed by the FSW foaming process only using the friction heat during the indentation of the tool used for spot FSW. ADC12 precursors can be foamed by the friction heat generated during spot FSW without using TiH₂ as a blowing agent. ADC12 foams can be obtained without using Al₂O₃ as a stabilization agent. This is considered to be due to impurities contained in the ADC12 die-castings. ADC12 foams with Al₂O₃ exhibited a larger expansion ratio than those without Al₂O₃. ADC12 foams with Al₂O₃ had significantly finer pores than those without Al₂O₃. The pore diameters of the ADC12 foams with Al₂O₃ were approximately half of those of the foams without Al₂O₃. This is considered to be due to the higher viscosity of the ADC12 substrate containing Al₂O₃.

Original language	English
Pages (from-to)	185-190
Number of pages	6
Journal	Journal of Materials Processing Technology
Volume	265
DOIs	https://doi.org/10.1016/j.jmatprotec.2018.10.013
Publication status	Published - 2019 Mar 1

Keywords

Cellular materials
Foaming
Friction stir welding
Precursor

ASJC Scopus subject areas

Ceramics and Composites
Computer Science Applications
Metals and Alloys
Industrial and Manufacturing Engineering

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10.1016/j.jmatprotec.2018.10.013

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title = "Foaming behavior of blowing- and stabilization-agent-free aluminum foam precursor during spot friction stir welding",

abstract = "ADC12 die-casting precursors containing many gas pores were fabricated by the friction stir welding (FSW) route and were foamed by the FSW foaming process only using the friction heat during the indentation of the tool used for spot FSW. ADC12 precursors can be foamed by the friction heat generated during spot FSW without using TiH2 as a blowing agent. ADC12 foams can be obtained without using Al2O3 as a stabilization agent. This is considered to be due to impurities contained in the ADC12 die-castings. ADC12 foams with Al2O3 exhibited a larger expansion ratio than those without Al2O3. ADC12 foams with Al2O3 had significantly finer pores than those without Al2O3. The pore diameters of the ADC12 foams with Al2O3 were approximately half of those of the foams without Al2O3. This is considered to be due to the higher viscosity of the ADC12 substrate containing Al2O3.",

keywords = "Cellular materials, Foaming, Friction stir welding, Precursor",

author = "Yoshihiko Hangai and Keisuke Takada and Hidetoshi Fujii and Yasuhiro Aoki and Takao Utsunomiya",

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AU - Hangai, Yoshihiko

AU - Takada, Keisuke

AU - Fujii, Hidetoshi

AU - Aoki, Yasuhiro

AU - Utsunomiya, Takao

PY - 2019/3/1

Y1 - 2019/3/1

N2 - ADC12 die-casting precursors containing many gas pores were fabricated by the friction stir welding (FSW) route and were foamed by the FSW foaming process only using the friction heat during the indentation of the tool used for spot FSW. ADC12 precursors can be foamed by the friction heat generated during spot FSW without using TiH2 as a blowing agent. ADC12 foams can be obtained without using Al2O3 as a stabilization agent. This is considered to be due to impurities contained in the ADC12 die-castings. ADC12 foams with Al2O3 exhibited a larger expansion ratio than those without Al2O3. ADC12 foams with Al2O3 had significantly finer pores than those without Al2O3. The pore diameters of the ADC12 foams with Al2O3 were approximately half of those of the foams without Al2O3. This is considered to be due to the higher viscosity of the ADC12 substrate containing Al2O3.

AB - ADC12 die-casting precursors containing many gas pores were fabricated by the friction stir welding (FSW) route and were foamed by the FSW foaming process only using the friction heat during the indentation of the tool used for spot FSW. ADC12 precursors can be foamed by the friction heat generated during spot FSW without using TiH2 as a blowing agent. ADC12 foams can be obtained without using Al2O3 as a stabilization agent. This is considered to be due to impurities contained in the ADC12 die-castings. ADC12 foams with Al2O3 exhibited a larger expansion ratio than those without Al2O3. ADC12 foams with Al2O3 had significantly finer pores than those without Al2O3. The pore diameters of the ADC12 foams with Al2O3 were approximately half of those of the foams without Al2O3. This is considered to be due to the higher viscosity of the ADC12 substrate containing Al2O3.

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