{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,14]],"date-time":"2026-04-14T22:49:47Z","timestamp":1776206987952,"version":"3.50.1"},"reference-count":17,"publisher":"Emerald","issue":"3","license":[{"start":{"date-parts":[[2018,6,11]],"date-time":"2018-06-11T00:00:00Z","timestamp":1528675200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.emerald.com\/insight\/site-policies"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJSI"],"published-print":{"date-parts":[[2018,6,11]]},"abstract":"<jats:sec><jats:title content-type=\"abstract-subheading\">Purpose<\/jats:title><jats:p>For nowadays construction purposes, it is necessary to define the life cycle of elements with defects. As steels 42CrMo4 and 41Cr4 are typical materials used for elements working under fatigue loading conditions, it is worth to know how they will behave after different heat treatment. Additionally, typical mechanical properties of material (hardness, tensile strength, etc.) are not defining material\u2019s fatigue resistance. Therefore, it is worth to compare, except mechanical properties, microstructure of the samples after heat treatment as well. The paper aims to discuss these issues.<\/jats:p><\/jats:sec><jats:sec><jats:title content-type=\"abstract-subheading\">Design\/methodology\/approach<\/jats:title><jats:p>Samples of normalized 42CrMo4 (and 41Cr4) steel were heat treated under three different conditions. All heat treatments were designed in order to change microstructural properties of the material. Fatigue tests were carried out according to ASTM E647-15 standard using compact tension specimens. Later on, based on obtained results, coefficients C and m of Paris\u2019 Law for all specimens were estimated. Similar procedure was performed for 41Cr4 steel after quenching and tempering in different temperatures.<\/jats:p><\/jats:sec><jats:sec><jats:title content-type=\"abstract-subheading\">Findings<\/jats:title><jats:p>The influence of heat treatment on the fatigue crack growth rates (42CrMo4, 41Cr4 steel) has been confirmed. The higher fatigue crack growth rates were observed for lower tempering temperatures.<\/jats:p><\/jats:sec><jats:sec><jats:title content-type=\"abstract-subheading\">Originality\/value<\/jats:title><jats:p>This study is associated with influence of microstructural properties of the material on its\u2019 fatigue fracture. The kinetic fatigue fracture diagrams have been constructed. For each type of material (and its heat treatment), the Paris law constants were determined.<\/jats:p><\/jats:sec>","DOI":"10.1108\/ijsi-01-2018-0003","type":"journal-article","created":{"date-parts":[[2018,5,10]],"date-time":"2018-05-10T07:09:35Z","timestamp":1525936175000},"page":"326-336","source":"Crossref","is-referenced-by-count":16,"title":["Fatigue crack growth of 42CrMo4 and 41Cr4 steels under different heat treatment conditions"],"prefix":"10.1108","volume":"9","author":[{"given":"Grzegorz","family":"Lesiuk","sequence":"first","affiliation":[]},{"given":"Monika Maria","family":"Duda","sequence":"additional","affiliation":[]},{"given":"Jos\u00e9","family":"Correia","sequence":"additional","affiliation":[]},{"given":"Abilio M.P.","family":"de Jesus","sequence":"additional","affiliation":[]},{"given":"Rui","family":"Cal\u00e7ada","sequence":"additional","affiliation":[]}],"member":"140","reference":[{"key":"key2020092815531127400_ref001","doi-asserted-by":"crossref","unstructured":"ASTM E647 (2015), \u201cStandard test method for measurement of fatigue crack growth rates\u201d, ASTM International, West Conshohocken, PA, available at: https:\/\/doi.org\/10.1520\/E0647-15E01","DOI":"10.1520\/E0647-15E01"},{"key":"key2020092815531127400_ref002","doi-asserted-by":"crossref","first-page":"597","DOI":"10.1007\/s11665-007-9043-1","article-title":"Analysis of tempering treatment on material properties of DIN 41Cr4 and DIN 42CrMo4 Steels","volume":"16","year":"2007","journal-title":"Journal of Materials Engineering and Performance"},{"key":"key2020092815531127400_ref003","first-page":"221","article-title":"An effect of laser hardening on contact and bending fatigue of a 42CrMo4 Steel","volume":"665","year":"2012","journal-title":"Key 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Fracture"},{"issue":"1","key":"key2020092815531127400_ref007","first-page":"269","article-title":"Fractal dimension of metallic fracture surface","volume":"141","year":"2006","journal-title":"International Journal of Fracture"},{"key":"key2020092815531127400_ref008","article-title":"Description of fatigue crack growth in steel structural components using energy approach-Influence of the microstructure on the FCGR","year":"2016"},{"key":"key2020092815531127400_ref009","doi-asserted-by":"crossref","first-page":"324","DOI":"10.1016\/j.matdes.2017.07.017","article-title":"Uniaxial fatigue properties of closed die hot forged 42CrMo4 steel: Effect of flash and mechanical surface treatments","volume":"132","year":"2017","journal-title":"Materials & Design"},{"key":"key2020092815531127400_ref010","volume-title":"The Steel Handbook","year":"2007"},{"key":"key2020092815531127400_ref011","first-page":"528","article-title":"A critical analysis of crack propagation 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