Short Communication
Crack growth in conventionally manufactured pure nickel, titanium and aluminum and the cold spray additively manufactured equivalents

https://doi.org/10.1016/j.addlet.2022.100043Get rights and content
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Highlights

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    Illustrates that crack growth in conventionally manufactured as well as CSAM Ni, Ti and Al parts can be characterized by a single governing equation.

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    Extends the application of the Hartman-Schijve equation to these pure metals.

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    Illustrates that crack growth in conventionally manufactured and CSAM parts can be represented by an identical curve by allowing for differences in the fracture toughness and fatigue threshold.

Abstract

It has recently been shown that when the da/dN versus ΔK curves associated with crack growth in conventionally manufactured, additively manufactured (AM), and cold spray additively manufactured (CSAM) 316L stainless steel are replotted with da/dN expressed as a function of the Schwalbe crack driving force (Δκ), then the various different curves collapsed onto a single master curve. This study reveals that this phenomenon also arises for crack growth in titanium, nickel, and aluminum. In each case, the da/dN versus Δκ relationship is shown to be independent of whether the specimen was conventionally manufactured or produced by CSAM.

Keywords

Cold spray additive manufacturing
Fatigue crack growth
Hartman-Schijve equation

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© 2022 The Authors. Published by Elsevier B.V.