Institute of Fundamental Technological Research
Polish Academy of Sciences

Partners

Roland Brunner


Recent publications
1.  Węglewski W., Sequeira A., Bochenek K., Rosc J., Brunner R., Basista M.A., Finite element modeling of thermal residual stresses in functionally graded aluminum-matrix composites using X-ray micro-computed tomography, FINITE ELEMENTS IN ANALYSIS AND DESIGN, ISSN: 0168-874X, DOI: 10.1016/j.finel.2024.104239, Vol.241, No.104239, pp.1-16, 2024

Abstract:
Metal-ceramic composites by their nature have thermal residual stresses at the micro-level, which can compromise the integrity of structural elements made from these materials. The evaluation of thermal residual stresses is therefore of continuing research interest both experimentally and by modeling. In this study, two functionally graded aluminum alloy matrix composites, AlSi12/Al2O3 and AlSi12/SiC, each consisting of three composite layers with a stepwise gradient of ceramic content (10, 20, 30 vol%), were produced by powder metallurgy. Thermal residual stresses in the AlSi12 matrix and the ceramic reinforcement of the ungraded and graded composites were measured by neutron diffraction. Based on the X-ray micro-computed tomography (micro-XCT) images of the actual microstructure, a series of finite element models were developed to simulate the thermal residual stresses in the AlSi12 matrix and the reinforcing ceramics Al2O3 and SiC. The accuracy of the numerical predictions is high for all cases considered, with a difference of less than 5 % from the neutron diffraction measurements. It is shown numerically and validated by neutron diffraction data that the average residual stresses in the graded AlSi12/Al2O3 and AlSi12/SiC composites are lower than in the corresponding ungraded composites, which may be advantageous for engineering applications.

Keywords:
Finite element modeling,Micro-XCT,Thermal residual stress,Hot pressing,Aluminum matrix composites

Affiliations:
Węglewski W. - IPPT PAN
Sequeira A. - IPPT PAN
Bochenek K. - IPPT PAN
Rosc J. - other affiliation
Brunner R. - other affiliation
Basista M.A. - IPPT PAN

Conference abstracts
1.  Węglewski W., Sequeira A., Bochenek K., Rosc J., Brunner R., Basista M., X-ray micro-computed tomography based model of thermal residual stress in functionally graded aluminum-matrix composites, SolMech 2024, 43rd Solid Mechanics Conference, 2024-09-16/09-18, Wrocław (PL), pp.1, 2024

Category A Plus

IPPT PAN

logo ippt            Pawińskiego 5B, 02-106 Warsaw
  +48 22 826 12 81 (central)
  +48 22 826 98 15
 

Find Us

mapka
© Institute of Fundamental Technological Research Polish Academy of Sciences 2024