Hardness

https://www.wikidata.org/wiki/Q3236003

Field Hierarchy

Parent
Physics 31.7M papers	Materials science 18.2M papers	Composite material 8.6M papers	Thermodynamics 5M papers
Metallurgy 4.7M papers
Current
Hardness 13k papers
Child
Case hardening 3,089 papers

Trends

Notes

History