Hot Isostatic Pressing (HIP), Heat Treatment and Additive Manufacturing of Metal Alloys
A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Metals and Alloys".
Deadline for manuscript submissions: closed (20 February 2024) | Viewed by 5147
Special Issue Editors
Interests: additive manufacturing (AM); hot isostatic pressing (HIP); Ni alloys; hot working tool steels; heat treatment; microstructure analysis
Special Issues, Collections and Topics in MDPI journals
Interests: hot isostatic pressing; additive manufacturing; advanced steels; nickel-based alloys
Special Issues, Collections and Topics in MDPI journals
Special Issue Information
Dear Colleagues,
The hot isostatic pressing (HIP) process was developed in 1955, and since then it has undergone a radical process of renewal and development. It was first used for cladding alloys for nuclear power production purposes. Today, HIP has gained renewed interest—especially with the affirmation of the powder metallurgy near-net-shape HIP (NNSHIP) manufacturing processes and of the practice of HIP post-treating additive manufactured (AM) parts. Tailored cycles can be applied to a wide number of materials to obtain fully dense medium-to-large components starting from loose powders or to eliminate the most significant flaws inherent in AM parts. Further achievements in cycle optimization are studied to enhance the reliability and performance of components operating in highly demanding environments. The application of these techniques is highly appealing—especially for materials which are difficult to forge and to machine.
Apart from the clear technical achievements provided by HIP, new solutions in terms of HIP industrial equipment and of tooling for the NNSHIP process are currently being introduced in the market to improve the manufacturing readiness level (MRL) of such fabrication routes, and to reduce their related cost. Another topic of increasing interest is the development of reliable simulation models that help to design the tooling in NNSHIP, thus reducing the buy-to-fly index of this process.
This proposed Special Issue of Materials aims to present the latest efforts made in the abovementioned topics. Contributions are particularly invited from, but not limited to, those who are involved in:
- Developing tailored HIP cycles for materials typically adopted for additive manufacturing, particularly (but not limited to) nickel-based superalloys, TiAl, or titanium-based alloys;
- Understanding of microstructure evolutions due to HIP, for instance, recrystallization, second-phase dissolution or grain boundary stability and of their impact on mechanical properties;
- Studying the effects of high pressure on phase transformations in materials or of the implementation of thermal heat treatments during or immediately after the HIP cycle;
- Developing simulation models regarding the single or multiple steps of near-net-shape HIP processes (i.e., capsule filling and/or densification and/or microstructural evolutions during the cooling stage);
- Assessing eventual residual defects and shape stability of components after HIP and studying potential solutions for them;
- Studying the interactions and modifications which can be activated by elemental diffusion at the interface between the powders and the capsule used to contain them in NNSHIP.
Prof. Dr. Daniele Ugues
Dr. Emilio Bassini
Guest Editors
Manuscript Submission Information
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Keywords
- near-net-shape hot isostatic pressing
- heat treatment
- recovery of defects structure
- additive manufacturing (AM)
- synergy between AM and HIP
- metallurgical transformations
- difficult-to-forge and difficult-to-machine materials
- demanding service performance
- MRL
- buy-to-fly
