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Parameter optimization and mechanical properties of 42CrMo4 manufactured by laser powder bed fusion

Shi, Chuan 1; Dietrich, Stefan ORCID iD icon 1; Schulze, Volker 1
1 Institut für Angewandte Materialien – Werkstoffkunde (IAM-WK), Karlsruher Institut für Technologie (KIT)

Abstract:

To study the manufacturability and mechanical properties of a low alloy heat treatable medium carbon steel by additive manufacturing, 42CrMo4 (AISI4140) specimens were manufactured by laser powder bed fusion. Influences of processing parameters on relative density and crack density were investigated. Moreover, Charpy impact tests, microhardness, and tensile tests for specimens with and without preheating were also studied. Results showed that the primary defects in the microstructure of additively manufactured samples were the lack of fusion pores and microcracks. The variation of processing parameters influences the porosity and microcracks prominently. The impact toughness of specimens with preheating is around three times higher than specimens without preheating. However, post heat treatment for as-built specimens, such as tempering at different temperature ranges, did not improve the impact toughness further. The detailed fracture mechanism for the massive difference in the impact toughness was investigated.


Verlagsausgabe §
DOI: 10.5445/IR/1000148459
Veröffentlicht am 11.07.2022
Originalveröffentlichung
DOI: 10.1007/s00170-022-09474-9
Scopus
Zitationen: 7
Web of Science
Zitationen: 6
Dimensions
Zitationen: 8
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Werkstoffkunde (IAM-WK)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 07.2022
Sprache Englisch
Identifikator ISSN: 0268-3768, 1433-3015
KITopen-ID: 1000148459
Erschienen in The International Journal of Advanced Manufacturing Technology
Verlag Springer
Band 121
Heft 3-4
Seiten 1899–1913
Vorab online veröffentlicht am 04.06.2022
Nachgewiesen in Web of Science
Dimensions
Scopus
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