Microstructure determines materials properties – which then determines performance (both mechanically and corrosion-wise). Learn how materials selection and other processes can help prevent corrosion. 

The Microstructure-Properties-Performance Paradigm

One of the most important ideas in metallurgy and materials science is known as the microstructure-properties-performance paradigm. It starts with microstructure – the fundamental structure of metals that forms during casting, forging, heat treatment, and other steps in the production process. For example, 316 stainless steel with cold work looks like this – austenitic with low amounts of precipitates on the grain boundaries and cold-work lines:

The microstructure determines the properties of the material – both corrosion resistance and mechanical properties like strength and toughness. Looking at 316L stainless again, the strength is increased after cold work and toughness drops. Low amounts of grain boundary precipitates results in good corrosion resistance. Tests like ASTM A262 can be used to confirm whether the material will have acceptable corrosion resistance.

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