materjali sitke purunemise tulemusena moodustunud hall amorfne murdepind, kui metall on piisavalt sitke, põhjustamaks kristallide pikenemist enne purunemist (vrd teraline murd, siidjas murd; vastand: habras murd)
Hea teada
Kui kiuline purunemine on löögipaindekatse tulemuseks, siis seda võib võtta metalli sikuse ilminguna.
a gray and amorphous fracture that results when metal is sufficiently ductile for the crystals to elongate before fracture occurs (opposite: crystalline fracture; compare: granular fracture, silky fracture)
Hea teada
When a fibrous fracture is obtained in an impact test, it may be regarded as definite evidence of toughness of the metal.
