Alloy Design Optimization of Stainless Steel’s Performance and Environmental Impactthrough Taguchi based Grey Relational Analysis

• The current work presents an optimization approach for improving stainless steel'sperformance and environmental impact. A Taguchi-based Grey Relational Analysis isemployed to determine the optimal alloy design of six stainless steels (304, 316L, 904L, 2304,2205, 2507). The alloy design of a multi-variable system (C, Mn, Cr, Ni, N, Mo and Cu) isinitially formulated based on the Taguchi orthogonal array. It combines the multi-performances(pitting corrosion resistance, proof strength, tensile strength, greenhouse gas emissions) todetermine a numerical score and suggests the optimal combination of alloy contents. Theresults are further analysed by using a range analysis to detect the significance of each alloyparameter and its level. The results show that nitrogen plays the most important role indetermining the stainless steel’s combined performance. Besides, the optimum alloy designconsists of a high content of nitrogen, chromium, molybdenum and copper combined with alow content of nickel. This study aims to show the possible outcomes of different steelperformances and provide insights into the balance between the performance andenvironmental impact of stainless steels.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)

Nyckelord

alloy optimization

stainless steel

greenhouse gas emissions

Taguchi

Grey Relational Analysis

strength

corrosion

Materials Science and Engineering

Teknisk materialvetenskap

Materials Science and Engineering

Teknisk materialvetenskap

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