Influence of discontinuities on fatigue strength using the example of additively manufactured specimens made of AlSi10Mg

Fatigue strength is largely affected by the influence of discontinuities: geometric notches like holes and corners in components, surface notches (roughness), pores and inclusions in the material. Therefore fatigue of structures and materials is a local problem and fatigue strength calculations are...

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Autores principales:	Beier Heinz Thomas, Yadegari Patrick, Vormwald Michael
Formato:	article
Lenguaje:	EN FR
Publicado:	EDP Sciences 2021
Materias:	Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/c66d3af2bb8040eb9969109fb89e9268
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spelling	oai:doaj.org-article:c66d3af2bb8040eb9969109fb89e92682021-12-02T17:13:46ZInfluence of discontinuities on fatigue strength using the example of additively manufactured specimens made of AlSi10Mg2261-236X10.1051/matecconf/202134902010https://doaj.org/article/c66d3af2bb8040eb9969109fb89e92682021-01-01T00:00:00Zhttps://www.matec-conferences.org/articles/matecconf/pdf/2021/18/matecconf_iceaf2021_02010.pdfhttps://doaj.org/toc/2261-236XFatigue strength is largely affected by the influence of discontinuities: geometric notches like holes and corners in components, surface notches (roughness), pores and inclusions in the material. Therefore fatigue of structures and materials is a local problem and fatigue strength calculations are best carried out using local approaches such as local stress concept, local strain concept or fracture mechanical concepts. In this investigation, the influence of discontinuities on low cycle and high cycle fatigue strength of materials was examined on the example of additively produced material specimens made of aluminium AlSi10Mg by using a fracture mechanics parameter. Results of fatigue tests on hourglass-specimens made from four different series of 3-D printed specimens are presented. The examination of the fracture surfaces revealed that damage always started from pores located near the surface of the specimens. The fractography gave information about geometry, size and position of the crack-causing pores. The influence of such pores on the fatigue strength of the printed aluminium was investigated by using a modification of Murakami’s √area parameter. The common scatter band of the four test series could thus be reduced significantly.Beier Heinz ThomasYadegari PatrickVormwald MichaelEDP SciencesarticleEngineering (General). Civil engineering (General)TA1-2040ENFRMATEC Web of Conferences, Vol 349, p 02010 (2021)
institution	DOAJ
collection	DOAJ
language	EN FR
topic	Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Engineering (General). Civil engineering (General) TA1-2040 Beier Heinz Thomas Yadegari Patrick Vormwald Michael Influence of discontinuities on fatigue strength using the example of additively manufactured specimens made of AlSi10Mg
description	Fatigue strength is largely affected by the influence of discontinuities: geometric notches like holes and corners in components, surface notches (roughness), pores and inclusions in the material. Therefore fatigue of structures and materials is a local problem and fatigue strength calculations are best carried out using local approaches such as local stress concept, local strain concept or fracture mechanical concepts. In this investigation, the influence of discontinuities on low cycle and high cycle fatigue strength of materials was examined on the example of additively produced material specimens made of aluminium AlSi10Mg by using a fracture mechanics parameter. Results of fatigue tests on hourglass-specimens made from four different series of 3-D printed specimens are presented. The examination of the fracture surfaces revealed that damage always started from pores located near the surface of the specimens. The fractography gave information about geometry, size and position of the crack-causing pores. The influence of such pores on the fatigue strength of the printed aluminium was investigated by using a modification of Murakami’s √area parameter. The common scatter band of the four test series could thus be reduced significantly.
format	article
author	Beier Heinz Thomas Yadegari Patrick Vormwald Michael
author_facet	Beier Heinz Thomas Yadegari Patrick Vormwald Michael
author_sort	Beier Heinz Thomas
title	Influence of discontinuities on fatigue strength using the example of additively manufactured specimens made of AlSi10Mg
title_short	Influence of discontinuities on fatigue strength using the example of additively manufactured specimens made of AlSi10Mg
title_full	Influence of discontinuities on fatigue strength using the example of additively manufactured specimens made of AlSi10Mg
title_fullStr	Influence of discontinuities on fatigue strength using the example of additively manufactured specimens made of AlSi10Mg
title_full_unstemmed	Influence of discontinuities on fatigue strength using the example of additively manufactured specimens made of AlSi10Mg
title_sort	influence of discontinuities on fatigue strength using the example of additively manufactured specimens made of alsi10mg
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/c66d3af2bb8040eb9969109fb89e9268
work_keys_str_mv	AT beierheinzthomas influenceofdiscontinuitiesonfatiguestrengthusingtheexampleofadditivelymanufacturedspecimensmadeofalsi10mg AT yadegaripatrick influenceofdiscontinuitiesonfatiguestrengthusingtheexampleofadditivelymanufacturedspecimensmadeofalsi10mg AT vormwaldmichael influenceofdiscontinuitiesonfatiguestrengthusingtheexampleofadditivelymanufacturedspecimensmadeofalsi10mg
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Influence of discontinuities on fatigue strength using the example of additively manufactured specimens made of AlSi10Mg

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