Wonder

Cold Spray Tensile Strength Literature Review

Delivered January 5, 2020. Contributor: ChristineD

Goals

Obtain a list of articles or studies that show test results of cold spray-deposited materials that have shown ultimate tensile strength values that are equal to or greater than 125,000 pounds per square inch. The data will be used prove that cold sprayed materials can withstand harsh operational environments such as oil and gas operations.

Early Findings

Cold Spray Tensile Strength Literature ReviewBased on a study from the Journal of Thermal Spray Technology, cold-sprayed coatings that incorporate helium resulted in a higher tensile strength.
Using this technique, the resulting tensile strength can reach around 85% of the "minimum required bulk value."
Higher levels of tensile strength was also observed when Ti-6Al-4V coatings were made to undergo a "hot isostatic pressing (HIP) process."
This reinforced process resulted in a tensile strength of 900MPa (130,534 psi).
Materials used include commercial Ti-6Al-4V ELI powder that was produced using "as atomization with near-spherical morphology."
The powder particles had a "Gaussian size distribution from 1 to 75 μm with an average particle size of about 30 μm."
The substrates were 100 × 50 × 5 mm plates that are produced using low carbon steel JIS: SS400, which were "grit-blasted with alumina powder and cleaned using acetone before spraying."
Proprietary Database Search Results
In addition to this public search, we scanned our proprietary research database of over 1 million sources and were unable to find any specific research reports that address your goals.

Proposed next steps:

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Our initial research provided a 2017 study on a cold spray technique that can result in a tensile strength of 900 MPa (130,534 psi). However, more recent studies that have the desired tensile strength results were not found in our initial hour of research. Furthermore, most of the available study found yielded only around 47,000 psi. Given this, we propose to continue with the research to provide 2-3 additional studies on cold spray techniques and materials that can yield a treated material with a tensile strength of 47,000 to 125,000 psi (324 MPA to 861.84 MPa) or more. We will include information on the types of material used, the cold spray techniques employed, the resulting tensile strength, and other notable details. We will focus first on studies or literature from the last two years before expanding to older documents. This will be a globally-focused research.

We also recommend undertaking additional research to provide 2-3 recommended best practices to reinforce cold-sprayed materials to achieve high levels of tensile strength.