Related Experiment Video
Updated: Jul 27, 2026

Full-field Strain Measurements for Microstructurally Small Fatigue Crack Propagation Using Digital Image Correlation Method
Published on: January 16, 2019
Dominant factors for fracture at the micro-scale in electrodeposited nickel alloys
May L Martin1, Li-Anne Liew1, David T Read1
1Material Measurement Laboratory, National Institute of Standards and Technology, Boulder, CO, 80305, United States.
Abstract:
Two different LIGA electrodeposited nickel alloys displayed distinct fracture modes after meso-scale tensile testing. The Ni-Co alloy failed in a ductile manner, while the Ni-Fe alloy failed in a more brittle-appearing manner. Various factors affecting the fracture are discussed; it was determined that the fracture mode did not depend upon the strain rate but did depend upon the sample geometry. The difference in the microstructure is likely the cause of the difference in fracture mode, as the Ni-Co alloy is fine-grained, while the Ni-Fe alloy is nano-grained and likely failed by a creep-like mechanism.

