…When tensile stress is applied to an object such as a metal, some materials will break as soon as the elastic limit is exceeded, while others will be stretched plastically and undergo so-called plastic deformation before breaking. This property of being stretched plastically is called ductility. In general, ductility is not a quantitative term, but rather a measure of the strain required to cause breakage. In other words, ductility is the property of an object being able to plastically deform without breaking, and malleability is the term used to describe the property of being able to be expanded into a plate or foil shape by compressive stress. … *Some of the terminology that refers to the "cup and cone type" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…金属材料などの物体に引張応力を加えた場合,材料によっては弾性限度を超えるとすぐに破壊に至るものもあれば,塑性的に引き延ばされ,いわゆる塑性変形を生じた後,破壊に至るものもある。この塑性的に引き延ばされる性質のことを延性という。一般には,延性とは定量的な言葉ではなく,破壊を生じさせるのに要するひずみの目安である。すなわち,物体が破壊することなく塑性的に変形しうる性質のうち,引張応力による変形に注目したものが延性であり,圧縮応力によって板状,あるいは箔状に広げられる性質に対する言葉として展性malleabilityが用いられる。… ※「カップアンドコーン型」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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