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Post-build healing of pores in metal AM: is HIP efficient?

9/3/2018

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Picture
micro-XCT reconstruction of Ti-6Al-4V powder with porosity trapped within powder particles shown in red [1]
​Post-build hot iso-static pressing (HIP) has become a common practice for the closure of some types of defects in AM metal components. Assuming your products lend themselves to HIPing, can this post-processing method get rid of all porosity?

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Mechanical finishing of additively manufactured metal parts

25/3/2016

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​The finishing step of additively manufactured metal components may be categorised into three mechanisms: 1) mechanical, 2) thermal and 3) (electro-)chemical processes. In this article, we review the effectiveness and impact of mechanical subtractive techniques on finished AM components.

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Mechanical properties of as-built A356 aluminium alloy processed by Selective Laser Melting

1/11/2015

 
A356 aluminium alloy (AlSi7Mg0.3) is widely used for gravity casting. Its good ductility, strength and corrosion resistance properties make it a compelling material for components requiring high reliability. Examples of parts traditionally built using A356 include engine parts, hydraulic components, brackets, housing covers in automotive, aerospace, and machinery industries [1, 2].
In this post we present the superior mechanical properties of A356 components showing 99.8% relative density [3] and built on the EOSINT M280.

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Combining SLM with heat treatment to get 25% elongation in AlSi12 alloys

11/6/2015

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Where the coarse acidular silicon acts as crack initiation sites in conventional cast alloys, refined eutectic microstructure of Al–Si alloys machined by SLM tends to dramatically improve their mechanical properties - specifically strength and ductility [1]. Here we report the latest findings on AlSi12 where SLM combined with solution heat treatment generates 25% tensile ductility. [2]


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Post-processing of AM metal components: HIPing

9/12/2014

 
HIPing stands for Hot Isostatic Press-ing. Hot isostatic pressing is a process in which components are subjected to the simultaneous application of heat and high pressure in an inert gas medium. Because the pressure is applied by a gas, it is uniform in all directions, or isostatic [1]. HIP is on one hand a forming technique, on the other hand a densifying technique [3].

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