|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Additive Manufacturing Fatigue and Fracture V: Processing-Structure-Property Investigations and Application to Qualification
||Tensile and Fatigue Behavior of Cold Sprayed Material Using Heat Treated Feedstock Powders
||Luke N. Brewer, A. R. Webb, Ning Zhu, J. Brian Jordon
|On-Site Speaker (Planned)
||Luke N. Brewer
This talk will present the impact of feedstock powder heat treatment on the tensile and fatigue properties of cold sprayed AA7075 material. The as-atomized microstructure of gas atomized powders leads to a reduction in deposition efficiency, strength, and ductility in cold sprayed materials; particularly for precipitation hardened alloys. We have produced cold sprayed materials using two types of heat treatment: full solution treatment and overaging. Cold spray deposition using helium gas was used to build samples large enough for multiple tensile and fatigue samples to be produced from cold spray-only materials. The full solution treated samples show a small increase in ductility over the as-atomized powders with a small decrease in yield strength. Overaged powders show a substantial increase in ductility but with a marked decrease in yield strength. In both cases, the heat treatment changes the nature of the fracture surface to one controlled primarily by microvoid coalescence.