TY - JOUR

T1 - Mechanical characterization of as-cast AA7075/6060 and CuSn6/Cu99.5 compounds using an experimental and numerical push-out test

AU - Greß, Thomas

AU - Stahl, Jens

AU - Mittler, Tim

AU - Spano, Lukas

AU - Chen, Hui

AU - Ben Khalifa, Noomane

AU - Volk, Wolfram

PY - 2019/3/28

Y1 - 2019/3/28

N2 - The present paper describes an experimental method and innovative numerical approach in the mechanical testing of rotationally symmetric, as-cast bilayer compounds using a push-out test. Specimens consisting of AA7075/6060 and CuSn6/Cu99.5 were fabricated by static and semi-continuous compound casting, respectively. Optical and mechanical testing methods showed a cohesive bonding character and a negligibly small transition zone between the joining partners. The shear strength was investigated by using an experimental push-out test. The experiments were reviewed by means of a finite element analysis. Therefore, Johnson-Cock failure parameters were determined for each casting material. Subsequently, a multi-sectional numerical model was built up to simulate the mechanical behavior of an as-cast bimetal sample during push-out testing. Lastly, a numerical parameter study yielded a strong dependency between optimized loads at the interface and the ratio of die clearance and sample thickness as well as the interface position.

AB - The present paper describes an experimental method and innovative numerical approach in the mechanical testing of rotationally symmetric, as-cast bilayer compounds using a push-out test. Specimens consisting of AA7075/6060 and CuSn6/Cu99.5 were fabricated by static and semi-continuous compound casting, respectively. Optical and mechanical testing methods showed a cohesive bonding character and a negligibly small transition zone between the joining partners. The shear strength was investigated by using an experimental push-out test. The experiments were reviewed by means of a finite element analysis. Therefore, Johnson-Cock failure parameters were determined for each casting material. Subsequently, a multi-sectional numerical model was built up to simulate the mechanical behavior of an as-cast bimetal sample during push-out testing. Lastly, a numerical parameter study yielded a strong dependency between optimized loads at the interface and the ratio of die clearance and sample thickness as well as the interface position.

KW - Engineering

KW - Bimetal testing

KW - Cohesion

KW - Compound casting

KW - Hybride finite element simulation

KW - Johnson-Cook

KW - Push-out test

UR - http://www.scopus.com/inward/record.url?scp=85062145793&partnerID=8YFLogxK

U2 - 10.1016/j.msea.2019.02.080

DO - 10.1016/j.msea.2019.02.080

M3 - Journal articles

VL - 751

SP - 214

EP - 225

JO - Materials Science & Engineering A

JF - Materials Science & Engineering A

SN - 0921-5093

ER -