# Photograph credits and licenses

This notice applies only to the photographs and derivatives listed here. Carlos Delgado and Peterlewis photographs use the stated Creative Commons licenses. The NIST item has its specific public-domain and attribution conditions. This notice does not relicense the article or the rest of the site.

## fracture-photo.webp

Author: Carlos Delgado
Required attribution: Carlos Delgado
Source: https://commons.wikimedia.org/wiki/File:Rotura_por_fatiga_-_01.jpg
Original image: https://upload.wikimedia.org/wikipedia/commons/6/6a/Rotura_por_fatiga_-_01.jpg?utm_source=commons.wikimedia.org&utm_campaign=index&utm_content=original
License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/
Changes: Resized and converted to WebP; no content retouching.

## crankshaft-photo.webp

Author: Peterlewis
Required attribution: Peterlewis
Source: https://commons.wikimedia.org/wiki/File:Crankshaft_fatigue.jpg
Original image: https://upload.wikimedia.org/wikipedia/commons/f/f9/Crankshaft_fatigue.jpg?utm_source=commons.wikimedia.org&utm_campaign=index&utm_content=original
License: CC BY-SA 3.0 — https://creativecommons.org/licenses/by-sa/3.0/
Changes: Resized and converted to WebP; no content retouching.

## nist-spring-photo.webp

Author: National Institute of Standards and Technology
Required attribution: National Institute of Standards and Technology Digital Collections, Gaithersburg, MD 20899.
Source: https://commons.wikimedia.org/wiki/File:MetalFatigue_006.jpg
Original image: https://upload.wikimedia.org/wikipedia/commons/a/a3/MetalFatigue_006.jpg?utm_source=commons.wikimedia.org&utm_campaign=index&utm_content=original
License: Public domain in the United States; NIST Digital Collections permits unrestricted use with required attribution. — https://nistdigitalarchives.contentdm.oclc.org/digital/collection/p16009coll47/id/76/
Changes: Converted to WebP; no content retouching or added annotations.

## fatigue-og-pt.webp

Author: Carlos Delgado; editorial design Andrade Safe
Required attribution: Carlos Delgado; editorial design Andrade Safe
Source: https://commons.wikimedia.org/wiki/File:Rotura_por_fatiga_-_01.jpg
Original image: https://upload.wikimedia.org/wikipedia/commons/6/6a/Rotura_por_fatiga_-_01.jpg?utm_source=commons.wikimedia.org&utm_campaign=index&utm_content=original
License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/
Changes: Cropped, resized, converted to WebP and overlaid with editorial text and gradient. This derivative is distributed under CC BY-SA 4.0.

## fatigue-og-en.webp

Author: Carlos Delgado; editorial design Andrade Safe
Required attribution: Carlos Delgado; editorial design Andrade Safe
Source: https://commons.wikimedia.org/wiki/File:Rotura_por_fatiga_-_01.jpg
Original image: https://upload.wikimedia.org/wikipedia/commons/6/6a/Rotura_por_fatiga_-_01.jpg?utm_source=commons.wikimedia.org&utm_campaign=index&utm_content=original
License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/
Changes: Cropped, resized, converted to WebP and overlaid with editorial text and gradient. This derivative is distributed under CC BY-SA 4.0.

## fatigue-og-es.webp

Author: Carlos Delgado; editorial design Andrade Safe
Required attribution: Carlos Delgado; editorial design Andrade Safe
Source: https://commons.wikimedia.org/wiki/File:Rotura_por_fatiga_-_01.jpg
Original image: https://upload.wikimedia.org/wikipedia/commons/6/6a/Rotura_por_fatiga_-_01.jpg?utm_source=commons.wikimedia.org&utm_campaign=index&utm_content=original
License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/
Changes: Cropped, resized, converted to WebP and overlaid with editorial text and gradient. This derivative is distributed under CC BY-SA 4.0.