Active path cracking

Japanese: 活性経路割れ - かっせいけいろわれ
Active path cracking

...This type of cracking occurs in bullet cartridges and is a typical example of stress corrosion cracking.
[Active Path Crack]
Based on the reaction mechanism, stress corrosion cracking can be broadly divided into two mechanisms: hydrogen embrittlement and active path corrosion (APC). Hydrogen embrittlement is unique to steels with a body-centered cubic structure, and the cracking morphology is transgranular. …

*Some of the terminology that refers to "active path cracking" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…銃弾の薬莢(やつきよう)などに発生するもので,応力腐食割れの典型的な例の一つである。
[活性経路割れ]
 応力腐食割れは反応のメカニズムのうえで,水素脆化機構と活性経路割れactive path corrosion(APC)機構の二つに大別される。水素脆化は体心立方構造の鋼に特有のもので,割れ形態は粒内割れである。…

※「活性経路割れ」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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