The effect of a simple annealing heat treatement on the mechanical properties of cold-sprayed aluminium.
- Soccoro, NM
Cold spray, a new member of the thermal spray process family, can be used to prepare dense, thick metal coatings. It has tremendous potential as a spray-forming process. However, it is well known that significant cold work occurs during the cold spray deposition process. This cold work results in hard coatings but relatively brittle bulk deposits. This work investigates the mechanical properties of cold-sprayed aluminum and the effect of annealing on those properties. Cold spray coatings approximately 1 cm thick were prepared using three different feedstock powders: Valimet H-10: Valimet H-20: and Brodmann Flomaster. ASTM E8 tensile specimens were machined from these coatings and tested using standard tensile testing procedures. Each material was tested in two conditions: as-sprayed; and after a 300 C, 22h air anneal. The as-sprayed material showed high ultimate strength and low ductility, with <1% elongation. The annealed samples showed a reduction in ultimate strength but a dramatic increase in ductility, with up to 10% elongation. The annealed samples exhibited mechanical properties that were similar to those of wrought 1100 H14 aluminum. Microstructural examination and fractography clearly showed a change in fracture mechanism between the as-sprayed and annealed materials. These results indicate good potential for cold spray as a bulkforming process.
- Research Organization:
- Sandia National Laboratories
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 973660
- Report Number(s):
- SAND2005-5012J
- Journal Information:
- Proposed for publication in the Journal of Thermal Spray Technology., Journal Name: Proposed for publication in the Journal of Thermal Spray Technology. Journal Issue: 2 Vol. 15
- Country of Publication:
- United States
- Language:
- English
Similar Records
Mechanical properties of consumable-arc-melted Kroll-process zirconium
Effect of post-deposition heat treatment on microstructure and mechanical properties of NASA HR-1 cold spray coatings