Mechanical properties of selective laser-melted components of AlSi10Mg for prototype vehicles

Description

.
Fabrication of aluminum alloy components by traditional high
-pressure die casting
(HPDC) requires cost- and time
-consuming tooling of steel dies, which makes HPDC uneconomic
for producing low
-volume components or prototypes. In comparison, powder bed
-based additive
manufacturing, e.g. selective laser melting (SLM), enables rapid prototyping and production of even
complex
-shaped components directly from computer
-aided design models without needing expen
-
sive tools. However, SLM prototype components must have almost identical mechanical properties
to HPDC serial components in order to emulate their functionality under different load conditions.
In this work uniaxial tensile properties of cast alloy AlSi10MnMg (EN AC
-43500) in condition T7,
i.e. with 120-170 MPa yield stress, 200
-240 MPa tensile strength and 9
-12 % strain at fracture, shall
be attained using selective laser melting of powder alloy AlSi10Mg (EN AC
-43000). These properties were achieved by tailored heat treatment. Furthermore, the effect of hot isostatic pressing
(HIP) was investigated. The results of the tensile tests confirmed the basic feasibility of substituting
HPDC components with SLM components for prototyping. In particular, similar tensile strength
and uniform strain were achieved for SLM samples in condition O, i.e. for SLM samples which
were only annealed.

Period	1 Jun 2021 → 5 Jun 2021
Event title	11th International Conference on Processing & Manufacturing of Advanced Material: THERMEC 2021
Event type	Conference
Location	Virtuell, AustriaShow on map
Degree of Recognition	International