Chapter 3 Powder metallurgy route
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Kundan Lal Sahu
Abstract
This chapter offers a discussion on the powder metallurgy route for the production of high-entropy alloys (HEAs). In the powder metallurgy route, the constitutional elements are mixed in their solid state. The selection of the elemental powder composition and the mixing of this elemental powder are also important and are mostly done by mechanical alloying. Mechanical alloying is a solid-state powder mixing and processing technique. Solid powder particles are synthesized in a variety of alloy phases in a high-energy ball mill. In order to attain homogeneous microstructures in HEAs, the powder metallurgy process, which includes mechanical alloying and the consequent consolidation process - spark plasma sintering, hot processing, cold processing, and sintering process, is efficient in terms of time, material, and energy.
Abstract
This chapter offers a discussion on the powder metallurgy route for the production of high-entropy alloys (HEAs). In the powder metallurgy route, the constitutional elements are mixed in their solid state. The selection of the elemental powder composition and the mixing of this elemental powder are also important and are mostly done by mechanical alloying. Mechanical alloying is a solid-state powder mixing and processing technique. Solid powder particles are synthesized in a variety of alloy phases in a high-energy ball mill. In order to attain homogeneous microstructures in HEAs, the powder metallurgy process, which includes mechanical alloying and the consequent consolidation process - spark plasma sintering, hot processing, cold processing, and sintering process, is efficient in terms of time, material, and energy.
Chapters in this book
- Frontmatter I
- Contents V
- About the editors VII
- List of contributing authors IX
- Chapter 1 Overview of high-entropy alloys 1
- Chapter 2 Classification of processing routes 31
- Chapter 3 Powder metallurgy route 41
- Chapter 4 Melting and casting route 57
- Chapter 5 Effect of processing routes on the microstructure/phases of high-entropy alloys 67
- Chapter 6 Correlation of the sintering parameters with the mechanical properties of HEAs processed through the powder metallurgy route 75
- Chapter 7 Basic alloying elements used in high-entropy alloys 83
- Chapter 8 Effect of alloying elements on the phases of high-entropy alloys 89
- Chapter 9 Effect of alloying elements on the properties of high-entropy alloys 99
- Chapter 10 Emerging processing routes 109
- Index 119
Chapters in this book
- Frontmatter I
- Contents V
- About the editors VII
- List of contributing authors IX
- Chapter 1 Overview of high-entropy alloys 1
- Chapter 2 Classification of processing routes 31
- Chapter 3 Powder metallurgy route 41
- Chapter 4 Melting and casting route 57
- Chapter 5 Effect of processing routes on the microstructure/phases of high-entropy alloys 67
- Chapter 6 Correlation of the sintering parameters with the mechanical properties of HEAs processed through the powder metallurgy route 75
- Chapter 7 Basic alloying elements used in high-entropy alloys 83
- Chapter 8 Effect of alloying elements on the phases of high-entropy alloys 89
- Chapter 9 Effect of alloying elements on the properties of high-entropy alloys 99
- Chapter 10 Emerging processing routes 109
- Index 119
