Experimental Investigations on the Effect of Process-Induced Material Characteristics on the Mechanical Performance of Selective Laser Melted Al- and Ti-Alloys

Date

Feb 10, 2017

Time

9:00 AM - 10:00 AM

Speaker

M. Sc. Jochen Tenkamp

Affiliation

TU Dortmund University, Department of Materials Test Engineering (WPT)

Language

en

Main Topic

Materialien

Other Topics

Materialien, Physik

Host

Brit Präßler-Wüstling

Description

J. Tenkamp*, S. Siddique, M. Awd, F. Walther TU Dortmund University, Department of Materials Test Engineering (WPT), Dortmund, Germany Due to special process conditions (small melt pool, high cooling rates) of additive manufacturing new material characteristics evolve compared to conventional manufacturing. This study investigates the quasistatic and fatigue properties of AlSi10Mg, AlSi12 and Ti6Al4V structures processed by selective laser melting (SLM). Different processing parameters of SLM process together with post heat treatment and mechanical processing have been investigated to achieve parameters for optimized fatigue performance. Differences in fatigue properties have been correlated to microstructural and surface modifications. For AlSi12, due to change in porosity and dendritic width, the parameter settings show a significant influence on the high cycle fatigue (HCF) and very high cycle fatigue (VHCF) properties until 109 cycles. For Ti6Al4V, the influence of surface processing (polishing, shot-peening) and hot isostatic pressing (HIP) was investigated in the HCF and VHCF regime. The results prove that mechanical reliability can be reached by optimized SLM process parameters and adapted post processing strategies. Keywords: Laser additive manufacturing, light weight structures, Al-alloy, Ti-alloy, fatigue strength, HCF, VHCF

Links

• Seminars at the IFW

Last modified: Feb 10, 2017, 8:59:51 AM