Influence of laser powder bed fusion parameters on microstructure and mechanical properties of Co–Cr dental alloy

Viderščak, Dalibor; Schauperl, Zdravko; Godec, Matjaž; Donik, Črtomir; Paulin, Irena; Šercer, Mario; Ćatić, Amir; Alar, Željko; Pustički, Daniel

doi:10.1016/j.jmrt.2024.05.052

Journal of Materials Research and Technology

2024

DOI: 10.1016/j.jmrt.2024.05.052

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Influence of laser powder bed fusion parameters on microstructure and mechanical properties of Co–Cr dental alloy

Dalibor Viderščak,

Zdravko Schauperl,

Matjaž Godec

et al.

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2024

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Laser Powder Bed Fusion Parameters Optimization for Enhanced Mechanical Properties of EOS Co-Cr Dental Alloy

Viderščak,

Schauperl,

Runje

et al. 2024

Materials

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This research explores how variations in laser powder bed fusion (LPBF) parameters—laser power (P), scanning speed (v), and base plate preheating temperature (ϑp)—affect the mechanical properties of the EOS Co-Cr SP2 dental alloy. A central composite design (CCD) was used to optimize the process parameters. Mechanical testing focused on crucial properties for dental applications, including yield strength (Rp0.2), elongation (ε), toughness (KVa), and flexural strength (Rms). Microstructural analysis was conducted using light and electron microscopy, while XRD identified microstructural phases. Statistical analysis (ANOVA, Scheffé post hoc test, α = 0.05) revealed significant effects of P, v, and ϑp on the mechanical properties. Response surface models (RSMs) were developed, and optimal parameters were determined to achieve maximum toughness and flexural strength. Maximum values were obtained with laser power above 205 W and base plate preheating at 310 °C. The mathematical model predicted toughness values with less than 5% deviation from experimental results, indicating high accuracy.

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Laser Powder Bed Fusion Parameters Optimization for Enhanced Mechanical Properties of EOS Co-Cr Dental Alloy

Viderščak,

Schauperl,

Runje

et al. 2024

Materials

View full text Add to dashboard Cite

show abstract

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Influence of laser powder bed fusion parameters on microstructure and mechanical properties of Co–Cr dental alloy

Cited by 1 publication

References 30 publications

Laser Powder Bed Fusion Parameters Optimization for Enhanced Mechanical Properties of EOS Co-Cr Dental Alloy

Laser Powder Bed Fusion Parameters Optimization for Enhanced Mechanical Properties of EOS Co-Cr Dental Alloy

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