TY - GEN

T1 - Numerical investigation of a hot forging process for partially particle-reinforced sintered components

AU - Behrens, Bernd Arno

AU - Bonhage, Martin

AU - Chugreev, Alexander

AU - Ross, Ingo

AU - Malik, Irfan Yousaf

N1 - Funding information: The presented results are based on the framework of the research project “Hot Forging of partially particle-reinforced sintered components” under the grant number BE1691/195-1. The authors would like to thank the German Research Foundation (DFG) for the financial support.

PY - 2018

Y1 - 2018

N2 - The expanding range of applications for parts made of light metals (magnesium, aluminium or titanium) could lead to a replacement of parts made of steel by the ones manufactured from light metal parts. However, magnesium and aluminium parts in particular reach their technical limits when exposed to high tribological, mechanical or thermal stress. For this reason, often the so called metal-matrix-composites (MMC), which possess the advantages of light metal (low weight and high ductility) as well as of the reinforcing phase (high hardness, high strength and good wear resistance), are used. This paper provides the initial findings of a fundamental investigation of the specific forming behaviour and the mechanical material properties for production of partially particle-reinforced powder metal parts. Cylindrical raw parts consisting of aluminium powder and a ceramic powder are produced by powder pressing and further compacted in a subsequent sintering process. The produced raw parts form the basis for an examination for a reduction of the existing residual porosities by subsequent upsetting and extrusion processes. The effects of the different process parameters (pressing force and forming temperature) on the material flow of the partially particle-reinforced material system and the structural strength of the formed parts are investigated. Numerical simulations are performed to analyse the density development during the above mentioned forming processes in order to determine the influence of porosity on the deformation behaviour of the considered material. The findings will help to evaluate the dependence of the residual porosity for sinter-forged parts on the prevailing forming mechanisms.

AB - The expanding range of applications for parts made of light metals (magnesium, aluminium or titanium) could lead to a replacement of parts made of steel by the ones manufactured from light metal parts. However, magnesium and aluminium parts in particular reach their technical limits when exposed to high tribological, mechanical or thermal stress. For this reason, often the so called metal-matrix-composites (MMC), which possess the advantages of light metal (low weight and high ductility) as well as of the reinforcing phase (high hardness, high strength and good wear resistance), are used. This paper provides the initial findings of a fundamental investigation of the specific forming behaviour and the mechanical material properties for production of partially particle-reinforced powder metal parts. Cylindrical raw parts consisting of aluminium powder and a ceramic powder are produced by powder pressing and further compacted in a subsequent sintering process. The produced raw parts form the basis for an examination for a reduction of the existing residual porosities by subsequent upsetting and extrusion processes. The effects of the different process parameters (pressing force and forming temperature) on the material flow of the partially particle-reinforced material system and the structural strength of the formed parts are investigated. Numerical simulations are performed to analyse the density development during the above mentioned forming processes in order to determine the influence of porosity on the deformation behaviour of the considered material. The findings will help to evaluate the dependence of the residual porosity for sinter-forged parts on the prevailing forming mechanisms.

KW - Aluminium

KW - FEM

KW - Metal-matrix-composites

KW - Powder metallurgy

UR - http://www.scopus.com/inward/record.url?scp=85059413175&partnerID=8YFLogxK

UR - https://metal2018.tanger.cz/files/uploads/02/Sbornik_Metal_2018_Content.pdf

M3 - Conference contribution

AN - SCOPUS:85059413175

T3 - METAL 2018 - 27th International Conference on Metallurgy and Materials, Conference Proceedings

SP - 330

EP - 335

BT - METAL 2018 - 27th International Conference on Metallurgy and Materials, Conference Proceedings

T2 - 27th International Conference on Metallurgy and Materials, METAL 2018

Y2 - 23 May 2018 through 25 May 2018

ER -