TY - GEN

T1 - Thermomechanical processing for creating bi-metal bearing bushings

AU - Goldstein, Robert

AU - Behrens, Bernd Arno

AU - Chugreeva, Anna

PY - 2018

Y1 - 2018

N2 - Over the last years, multi-material design aiming on manufacturing of application-optimized technical components has been gaining in importance. In this context, combination of steel and aluminum offers an effective solution for implementation of lightweight concepts due to its high strength-to-weight ratio. The steel can be placed in high- stressed . areas, where high performance properties are required, while the aluminum can be used for the rest of the. part, in order to save the component total weight. Due to dissimilar material properties of steel and aluminum, the process design for bi-metal forming is very challenging and requires a process-specific heating strategy, which development is in focus of this paper. The current study involves the potential for creating bi-metal bearing bushings consisting of steel 20MnCr5 and aluminum AA-6082 by closed-die-forging. Firstly, an overview of modem technologies for bi-metal forming is given. In following, the scientific issues and demanding challenges within this study- Are described for both, heating and subsequent forming. Results of the initial computer modeling and experimental validation of the heating behavior arc presented. Subsequently, the experimental forging tests were conducted with achieved temperature gradients. The forged parts were metallographically investigated to examine the resulting quality of the joining zone. Based on the obtained findings, the optimization proposals for the entire process are discussed.

AB - Over the last years, multi-material design aiming on manufacturing of application-optimized technical components has been gaining in importance. In this context, combination of steel and aluminum offers an effective solution for implementation of lightweight concepts due to its high strength-to-weight ratio. The steel can be placed in high- stressed . areas, where high performance properties are required, while the aluminum can be used for the rest of the. part, in order to save the component total weight. Due to dissimilar material properties of steel and aluminum, the process design for bi-metal forming is very challenging and requires a process-specific heating strategy, which development is in focus of this paper. The current study involves the potential for creating bi-metal bearing bushings consisting of steel 20MnCr5 and aluminum AA-6082 by closed-die-forging. Firstly, an overview of modem technologies for bi-metal forming is given. In following, the scientific issues and demanding challenges within this study- Are described for both, heating and subsequent forming. Results of the initial computer modeling and experimental validation of the heating behavior arc presented. Subsequently, the experimental forging tests were conducted with achieved temperature gradients. The forged parts were metallographically investigated to examine the resulting quality of the joining zone. Based on the obtained findings, the optimization proposals for the entire process are discussed.

UR - http://www.scopus.com/inward/record.url?scp=85059095446&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:85059095446

T3 - Thermal Processing in Motion 2018 - Including the International Conference on Heat Treatment and Surface Engineering in Automotive Applications

SP - 15

EP - 21

BT - Thermal Processing in Motion 2018 - Including the International Conference on Heat Treatment and Surface Engineering in Automotive Applications

A2 - Goldstein, Robert

A2 - Mackenzie, D. Scott

A2 - Frame, Lesley

A2 - Ferguson, Lynn

A2 - Guisbert, Dave

PB - ASM International

T2 - Thermal Processing in Motion 2018 - Including the 4th International Conference on Heat Treatment and Surface Engineering in Automotive Applications

Y2 - 5 June 2018 through 7 June 2018

ER -