Estimation of the Effect of Production Parameters on Mechanical Properties of Sintered Steels using ANOVA

• Published in: Archives of metallurgy and materials Vol. 62; no. 2; pp. 571 - 576
• Main Authors: Sułowski, M., Jordan, A., Czarski, A., Matusiewicz, P.
• Format: Journal Article
• Language: English
• Published: Warsaw De Gruyter Open 01.06.2017; Polish Academy of Sciences
• Subjects: Alloys; analysis of variance (ANOVA); Atmospheric models; Bend properties; Bend strength; Bend tests; Chemical composition; Chromium; Heat treatment; Impact strength; Manganese; Mechanical properties; Molybdenum; Multivariate analysis; Normality; Parameter estimation; powder metallurgy; Randomization; Sintering; Tensile strength; Tensile tests; Toughness; Variance (statistics); Variance analysis
• ISSN: 2300-1909; 1733-3490; 2300-1909
• DOI: 10.1515/amm-2017-0084

The object of the study was to assess the influence of selected production parameters of sintered Fe-Mn-Cr-Mo-C steels i.e. chemical composition, sintering temperature, sintering atmosphere and heat treatment on the following mechanical properties: impact toughness, hardness of the surface, tensile strength, bend strength after static tensile tests. In the investigations, the general linear model (GLM) of the multivariate analysis of variance ANOVA was used. All assumptions of ANOVA, i.e. randomization of the experiment, the normality of the residuals, equality of variance at different levels have been fulfilled and verified. The predictive strength of the constructed models expressed by the adjusted determination coefficient (R ) is at medium or large level – R is in the range from 41.46% to 76.97%. This work is focused mainly on the ANOVA methodology. A wide physical interpretation of the results will be possible after the optimization of the ANOVA models used.