Producing large P/M near-net shapes using hot isostatic pressing

Abstract

OverviewNear-Net Shape P/M This article describes the fabrication of near-net shapes from powders using the hot isostatic pressing (HIPing) process. The characteristics of typical HIPing systems, advantages and disadvantages of the process with respect to near-net-shape production, and particular processing concerns are discussed. Examples of current state-of-the-art powder-metallurgy near-net shapes are provided.

Anisotropic shrinkage during hip of encapsulated powder

“…A wide range of component types can be manufactured by using HIP as summarized by Atkinson and Davies (2000). Its capabilities include large and massive near-net-shape metal components (Samarov et al, 2005), such as parts applied in the oil and gas industry weighing up to 30 tones (Mashl et al, 1999), or net-shape impellers up to one meter in diameter reported by Masi et al (2014). Alternatively it can be used to make rods and profiles to produce small PM High Speed Steel cutting tools (Eisen, 1997), such as taps or drills (Bose and Eisen, 2003), which can weigh less than 100 g, or even very tiny parts such as dental brackets overviewed by Conway and Rizzo (1998).…”

Microstructural evolution and mechanical properties of powder metallurgy Ti–6Al–4V alloy based on heat response

“…PM route is being studied essentially as a technology upgrade of precision casting, and it can achieve more uniform and homogenous microstructure and isotropic properties through HIPing process. Meanwhile, the HIPing process is currently the most commercial and viable method to produce full dense PM materials and components, compared with other PM techniques [8]. With good process control, the mechanical properties of the PM alloys using HIPing can approach and sometimes exceed those of wrought alloys [9][10][11][12][13].…”

Microstructure and Mechanical Properties of Ti6Al4V Alloy Consolidated by Different Sintering Techniques

“…Cabezas-Villa et al investigated the mechanical properties of Ti6Al4V powders with different particle sizes [19]. Recently, HIP technique has been extensively utilized to fabricate Ti6Al4V alloy in a wide range of industries due to the possibility in producing complex shape, fully dense components, and the potential economic advantages [20][21][22][23]. Delo and Piehler [24] proposed the sintering model during HIP with early stage of Ti6Al4V powder compacts.…”