Abstract
• Illustrates that crack growth in conventionally manufactured as well as CSAM Ni, Ti and Al parts can be characterized by a single governing equation. • Extends the application of the Hartman-Schijve equation to these pure metals. • 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. It has recently been shown that when the d a /d N versus Δ K curves associated with crack growth in conventionally manufactured, additively manufactured (AM), and cold spray additively manufactured (CSAM) 316L stainless steel are replotted with d a/ d N expressed as a function of the Schwalbe crack driving force (Δ κ ), 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 d a/ d N versus Δ κ relationship is shown to be independent of whether the specimen was conventionally manufactured or produced by CSAM.
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