Hardness

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

Field Hierarchy

Parent
Physics 33M papers	Materials science 18.5M papers	Composite material 8.7M papers	Thermodynamics 5.1M papers
Metallurgy 4.8M papers
Current
Hardness 12.9k papers
Child
Case hardening 3,094 papers

Trends

Notes

History