1401 - TALAT Lecture 1401 Aluminium Powder Metallurgy 26...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
TALAT Lecture 1401 Aluminium Powder Metallurgy 26 pages, 25 figures Advanced Level 1 prepared by B. Verlinden, University of Leuven L. Froyen, University of Leuven, Belgium Objectives: to understand the differences between conventionally produced and powder metallurgy aluminium with respect to potential uses to learn about the various processes to produce and to consolidate alloy powders to illustrate the extension of the useful property range beyond that of limits of conventionally processed aluminium alloys to learn the advantages and disadvantages of aluminium produced by powder metallurgy to understand the potential of aluminium produced by the route of powder metallurgy. Prerequisites/Target Group: Students: Graduate education in metallurgy materials science, materials engineering Trainers: Research or teaching experience in metallurgy, materials science, materials engineering Date of Issue: 1994 EAA - European Aluminium Association
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
TALAT 1401 2 1401 Aluminium Powder Metallurgy Contents 1401.01 Introduction. ............................................................................. 3 1401.02 Powder Fabrication . ................................................................ 5 Main Fabrication Methods for Al Powder. .............................................................. 5 Rapid Solidification. ................................................................................................ 7 Characterisation of Metal Powders. ......................................................................... 8 Safety Considerations . ........................................................................................... 10 1401.03 Powder Consolidation . .......................................................... 10 Precompaction. ....................................................................................................... 11 Cold Compaction. .................................................................................................. 11 Sintering. ................................................................................................................ 12 Hot Consolidation (Full Density Processing) . ....................................................... 15 Post Consolidation. ................................................................................................ 17 Spray Forming. ....................................................................................................... 18 1401.04 Properties and Applications . ................................................ 19 Example 1: The Development of the P/M 7 XXX Alloys. .................................... 19 Example 2: High Strength Alloys for Elevated Temperatures. .............................. 21 Example 3: A High Modulus, Elevated Temperature Experimental Alloy: Al-Ti by Mechanical Alloying. ............................................................................................. 22 Conclusions. ........................................................................................................... 23 1401.05 List of Figures. ........................................................................ 26
Background image of page 2
TALAT 1401 3 1401.01 Introduction An improvement of the properties of available aluminium alloys would help the aluminium industry to conquer new markets for their products. The alloys obtained by the classical ingot route have been optimised by a careful choice of composition, the alloying elements, the fabrication techniques, and the thermal and thermomechanical treatments. Improved mechanical, physical and chemical properties would, however, be possible if alloys with compositions unattainable by the classical ingot route could be produced or if new processing techniques could be developed. The powder metallurgical (P/M) route creates some possibilities in this respect. The use of P/M has the following general objectives : Due to a rapid cooling refined and more homogeneous microstructures can be obtained. The wider choice of alloy compositions makes it possible to obtain tailored properties concerning density, thermal expansion etc The P/M technique is suitable for near net shaped products and better thermal stability as well as increased corrosion and tribological properties are possible. The production of P/M aluminium alloys is mainly done by two methods. For compositions with alloying elements with a high solubility in the liquid state, a rapid solidification technique is used. For alloying elements with low solubility in the liquid state, mixture in the solid state is preferred.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 26

1401 - TALAT Lecture 1401 Aluminium Powder Metallurgy 26...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online