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Studies of the Thermophysical Properties of 42CrMo4 Steel Manufactured Conventionally and via Laser Powder Bed Fusion (L-PBF) †.

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Title: Studies of the Thermophysical Properties of 42CrMo4 Steel Manufactured Conventionally and via Laser Powder Bed Fusion (L-PBF) †.
Authors: Koniorczyk, Piotr1 (AUTHOR) piotr.koniorczyk@wat.edu.pl, Zieliński, Mateusz1,2 (AUTHOR), Zmywaczyk, Janusz1 (AUTHOR), Sarzyński, Bartłomiej2 (AUTHOR)
Source: Materials (1996-1944). Mar2026, Vol. 19 Issue 6, p1070. 19p.
Subjects: Thermal diffusivity, Heat capacity, Thermal expansion, Selective laser melting, Steel, Manufacturing processes, Thermophysical properties, Manufacturing industries
Abstract: In this work, measurements of thermal diffusivity, heat capacity and thermal expansion of 40HM (42CrMo4, 1.7225, AISI 4140) steel manufactured conventionally and via Laser Powder Bed Fusion (L-PBF) were carried out in the temperature range from room temperature (RT) to 1000 °C. Thermophysical properties were tested using specialized test stands from NETZSCH. Thermal diffusivity was studied using both the LFA 427 laser flash apparatus and the LFA 467 xenon flash apparatus. Specific heat capacity was investigated using DSC 404 F1 Pegasus differential scanning calorimeter, and thermal expansion was investigated using the DIL 402 C. Inconel 600 and A310 steel were selected as the reference materials during the thermal diffusivity test using LFA467 in the RT÷500 °C range. The conventionally manufactured 40HM steel, in the form of hot-rolled bar stock, was subjected to standard heat treatment for this steel grade—quenching followed by high-temperature tempering. The additively manufactured 40HM steel was subjected to stress-relief annealing. The results revealed no significant differences between the thermophysical properties of the L-PBF-produced samples in the out-of-plane and in-plane build orientations. Furthermore, no substantial differences were observed between the thermophysical properties of the conventionally produced material and the material manufactured using the L-PBF technique. [ABSTRACT FROM AUTHOR]
Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 192591503
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PubTypeId: academicJournal
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  Label: Title
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  Data: Studies of the Thermophysical Properties of 42CrMo4 Steel Manufactured Conventionally and via Laser Powder Bed Fusion (L-PBF) †.
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  Data: <searchLink fieldCode="AR" term="%22Koniorczyk%2C+Piotr%22">Koniorczyk, Piotr</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> piotr.koniorczyk@wat.edu.pl</i><br /><searchLink fieldCode="AR" term="%22Zieliński%2C+Mateusz%22">Zieliński, Mateusz</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zmywaczyk%2C+Janusz%22">Zmywaczyk, Janusz</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sarzyński%2C+Bartłomiej%22">Sarzyński, Bartłomiej</searchLink><relatesTo>2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Materials+%281996-1944%29%22">Materials (1996-1944)</searchLink>. Mar2026, Vol. 19 Issue 6, p1070. 19p.
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  Data: <searchLink fieldCode="DE" term="%22Thermal+diffusivity%22">Thermal diffusivity</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+capacity%22">Heat capacity</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+expansion%22">Thermal expansion</searchLink><br /><searchLink fieldCode="DE" term="%22Selective+laser+melting%22">Selective laser melting</searchLink><br /><searchLink fieldCode="DE" term="%22Steel%22">Steel</searchLink><br /><searchLink fieldCode="DE" term="%22Manufacturing+processes%22">Manufacturing processes</searchLink><br /><searchLink fieldCode="DE" term="%22Thermophysical+properties%22">Thermophysical properties</searchLink><br /><searchLink fieldCode="DE" term="%22Manufacturing+industries%22">Manufacturing industries</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: In this work, measurements of thermal diffusivity, heat capacity and thermal expansion of 40HM (42CrMo4, 1.7225, AISI 4140) steel manufactured conventionally and via Laser Powder Bed Fusion (L-PBF) were carried out in the temperature range from room temperature (RT) to 1000 °C. Thermophysical properties were tested using specialized test stands from NETZSCH. Thermal diffusivity was studied using both the LFA 427 laser flash apparatus and the LFA 467 xenon flash apparatus. Specific heat capacity was investigated using DSC 404 F1 Pegasus differential scanning calorimeter, and thermal expansion was investigated using the DIL 402 C. Inconel 600 and A310 steel were selected as the reference materials during the thermal diffusivity test using LFA467 in the RT÷500 °C range. The conventionally manufactured 40HM steel, in the form of hot-rolled bar stock, was subjected to standard heat treatment for this steel grade—quenching followed by high-temperature tempering. The additively manufactured 40HM steel was subjected to stress-relief annealing. The results revealed no significant differences between the thermophysical properties of the L-PBF-produced samples in the out-of-plane and in-plane build orientations. Furthermore, no substantial differences were observed between the thermophysical properties of the conventionally produced material and the material manufactured using the L-PBF technique. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.3390/ma19061070
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 19
        StartPage: 1070
    Subjects:
      – SubjectFull: Thermal diffusivity
        Type: general
      – SubjectFull: Heat capacity
        Type: general
      – SubjectFull: Thermal expansion
        Type: general
      – SubjectFull: Selective laser melting
        Type: general
      – SubjectFull: Steel
        Type: general
      – SubjectFull: Manufacturing processes
        Type: general
      – SubjectFull: Thermophysical properties
        Type: general
      – SubjectFull: Manufacturing industries
        Type: general
    Titles:
      – TitleFull: Studies of the Thermophysical Properties of 42CrMo4 Steel Manufactured Conventionally and via Laser Powder Bed Fusion (L-PBF) †.
        Type: main
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          Name:
            NameFull: Koniorczyk, Piotr
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            NameFull: Zieliński, Mateusz
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            NameFull: Zmywaczyk, Janusz
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            NameFull: Sarzyński, Bartłomiej
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            – D: 15
              M: 03
              Text: Mar2026
              Type: published
              Y: 2026
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              Value: 19
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              Value: 6
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            – TitleFull: Materials (1996-1944)
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