---
name: materials-science
title: Reason Over General Processing-Structure-Property Linkages
description: Trace a processing route to the microstructure it produces and the properties that follow, keeping each link evidence-backed and bounded to its material system.
keywords:
- level:L1
- materials
---

Build the chain explicitly: processing history (composition, thermal path,
deformation, cooling rate, atmosphere) to microstructure (phases and
fractions, grain size and morphology, texture, precipitates, porosity,
residual stress) to properties (elastic, yield and flow, toughness, fatigue,
creep, transport) to in-service performance.

Treat each link as a claim needing its own support. A processing change that
is expected to refine grain size still requires evidence that it did, and
that the refinement moved the property that matters. Name the mechanism
connecting each pair, and the conditions under which it holds.

Do not transport a linkage across material classes, length scales, or
property regimes without justification: a Hall-Petch slope, a precipitate
strengthening increment, or a texture effect is specific to its system. For a
specific alloy class or family, use the more specific skill
(`metallic-materials`, `nickel-superalloys`) rather than reasoning
generically once that system is known; grade-specific values come from the
scientist's data or cited sources.

Return the linkage map, the evidence and mechanism for each link, the
boundaries of validity, and the characterization or simulation needed to
close the weakest link.