noun
toughness; fracture toughness
Technical term in materials science for a material's ability to absorb energy and deform without fracturing. Often contrasted with 脆性 (brittleness).
See also: 脆性
この鋼材は靭性が高く、衝撃に強い。
This steel has high toughness and is resistant to impact.
材料の靭性を評価する試験を行った。
We conducted a test to evaluate the fracture toughness of the material.
脆性 means brittleness, the opposite of 靭性. While 靭性 describes resistance to fracture, 脆性 describes the tendency to break without significant deformation.
強度 refers to strength (resistance to deformation or failure under load), whereas 靭性 specifically refers to toughness (energy absorption before fracture).
Compound of 靭 (じん, 'tough, pliable') and 性 (せい, 'property, nature'). The kanji 靭 is a variant of 靱; both are used in technical terms for toughness.