Residual stresses in a bulk metallic glass-stainless steel composite

C. C. Aydiner, E. Üstündag*, B. Clausen, J. C. Hanan, R. A. Winholtz, M. A.M. Bourke, A. Peker

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

Bulk metallic glasses (BMGs) are new structural materials with impressive mechanical properties. They can now be cast into large dimensions, which can lead to significant residual stress generation due to thermal tempering. In this process, a surface compression develops balanced with tension in the interior. To evaluate this phenomenon non-destructively, a model cylindrical stainless steel (SS)-BMG composite was prepared and studied using neutron diffraction and finite element (FE) modeling. The residual strain data from the SS obtained by diffraction were used in modeling calculations to show that significant tempering could be achieved in the composite (about -200 MPa surface compression in the SS). The strong bond between the SS and BMG allowed efficient load transfer and facilitated stress generation. The final values of the residual stresses were seen to be relatively insensitive to the high temperature constitutive behavior of the SS due to the physics of the thermal tempering in BMGs. The approach presented here constitutes an effective means to study non-destructively thermal tempering in BMGs.

Original languageEnglish
Pages (from-to)107-113
Number of pages7
JournalMaterials Science and Engineering: A
Volume399
Issue number1-2
DOIs
Publication statusPublished - 15 Jun 2005
Externally publishedYes

Funding

This study is supported by the Center for Structural Amorphous Metals (Army Research Office Grant no. DAAD19-01-0525) at the California Institute of Technology.

FundersFunder number
Center for Structural Amorphous Metals
Army Research Office

    Keywords

    • Finite element modeling
    • Metallic glass
    • Neutron diffraction
    • Residual stress
    • Strain measurement
    • Thermal tempering

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