Search Results for hot isostatic pressing

This article, the first in a two-part series, explains how powder metallurgy presents a cost-effective alternative to conventional titanium fabrication processes. It reviews the characteristics of different types of titanium powders and compares and contrasts near-net shape (NNS) production techniques, including conventional press-and-sinter, cold isostatic pressing (CIP), hot isostatic pressing (HIP), CIP-sinter, and CIP-sinter-HIP (CHIP). Other titanium production methods are covered in Part 2, which is scheduled for the October 2012 issue of AM&P .

This article is the second in a two-part series on cost-saving methods for the production of titanium components. Part 1, published in the September 2012 issue of AM&P , covered a number of powder metallurgy techniques, including press-and-sinter and both cold and hot isostatic pressing. Other near-net shape processes are described here, including additive layer manufacturing (ALM), metal injection molding (MIM), and spray deposition (SD). Examples are also given showing how titanium PM parts compare with cast and wrought components.

A powder metallurgy and hot isostatic pressing technology offers a new way to manufacture high pressure-retaining components for use in the power-generation industry.

New methods for processing titanium alloys offer the potential to enhance mechanical properties while reducing component cost. This article discusses innovative and potentially lower cost fabrication processes including additive manufacturing (AM), superplastic forming/diffusion, hot isostatic pressing (HIP) near-net shapes from prealloyed powder, injection molding, rapid solidification, mechanical alloying, and thermohydrogen processing.

Development of wear-resistant hardfacing materials using powder metallurgy/hot isostatic pressing technology offers an alternative to today's cobalt-based materials and those that suffer delamination damage. Ongoing research and development at the Electric Power Research Institute (EPRI), detailed in this article, examines the application of wear-resistant hardfacing materials using the PM/HIP process. The hope is to eliminate weldability and residual stress challenges associated with some hardfacing alloys, as well as to provide a wider range of potential alloy solutions to reduce cobalt use and to address delamination issues with incumbent materials.

For parts made by direct metal laser melting, heat treatment is important to set the final microstructure, which impacts mechanical properties.

High-strength, corrosion-resistant steel is proposed as a cost-effective alternative to titanium alloys due to its high specific strength, high fatigue strength, good toughness, and corrosion resistance.

Beryllium won a lengthy competition as the material of choice for the mirrors on the James Webb Space Telescope, set to launch in 2018. This article documents the development history leading up to that decision. It took decades to perfect powder atomization and HIP'ing processes to make optical-grade beryllium components homogeneous, isotropic, polishable, thermally and dimensionally stable, and above all, predictable.

Heat treaters are discovering new opportunities in the rapidly expanding field of additive manufacturing. This article describes some of the opportunities and challenges for heat treaters in this technology area.

Field assisted sintering technology (FAST) enables cost-effective manufacturing of metal, ceramic, and composite components with sub-micron grain microstructures and tailored properties.

Field assisted sintering is a breakthrough technique for producing aluminum matrix composites that could replace high-density materials in a variety of applications.

This case study describes how electron-beam melting, a powder bed additive manufacturing technology, helped reduce the cost and material scrap associated with the production of Ti-6Al-4V brackets used in the hot side of the engine on Lockheed Martin's Joint Strike Fighter.

Capable of stopping 50-caliber, armor-piercing rounds, ALON and Spinel are hard and durable transparent polycrystalline materials manufactured using powder based processes. This article describes their unique combination of mechanical, optical, and chemical properties, and reports on recent advances in manufacturing to enable their use for critical defense, industrial, and consumer applications.

The next generation of metal additive manufacturing leverages the advantages of cold spray to offer promising options for applications in aerospace, automotive, and biomedical engineering.

Field assisted sintering technology (FAST) enables hybrid components for aerospace to be designed with reduced weight and without sacrificing performance. FAST can be used to produce metal, ceramic, and composite components with tailored properties via a powder metallurgy approach. In many cases, it is a one-step, cost-effective manufacturing process for production of net-shape components.

Groundbreaking additive manufacturing technology is gaining traction in technical ceramics. This article describes advances in additive manufacturing of technical ceramics, to enable broader use of AM and to enable new applications.

Orion’s Exploration Flight Test 1 vehicle used four additively manufactured vent assemblies to equalize pressure between unpressurized portions of the spacecraft and the external environment.

The 15th World Conference on Titanium included papers on titanium alloy development, efforts to reduce Ti powder costs, additive manufacturing, and computational materials modeling tools. This article reviews some of the key advances reported at the conference.

A new single-step plasma-assisted gas atomization process for metal powder manufacturing can reduce carbon footprint by over 99% compared to traditional methods. This technology uses scrap metals as feedstock, eliminating the need for virgin ores while meeting ASTM/AMS powder quality specifications. Beyond environmental benefits, the innovation addresses material scarcity that has historically constrained the additive manufacturing industry while mitigating supply chain delays and market uncertainties. The process supports manufacturers in achieving environmental goals through significant emissions reduction and localized sourcing.

Although the widespread use of titanium alloys is constrained by high costs, powder metallurgy techniques such as additive manufacturing (AM) represent an economical approach to fabricating titanium components. Various approaches to AM, along with examples of components made by different AM processes, are presented. The microstructures and mechanical properties of Ti-6Al-4V produced by AM are also discussed and compared with cast and wrought products. Finally, the economic advantages of AM compared to conventional processing are presented.