Intergranular cavitation in stressed metals

摘要: Abstract It has been found that when copper, alpha-brass and magnesium are strained at elevated temperatures, cavities appear in the intercrystalline boundaries. These more prevalent boundaries transverse to tensile stress axis. This intergranular cavitation is accompanied by a loss of ductility. For any temperature greater lower strain rate for given higher temperature. The nucleate regular intervals under ultimately link form cracks. observations seem be consistent with suggestion agglomeration sufficient numbers vacant lattice sites stable ‘hole.’ They then grow partly ‘absorption’ vacancies concentration periphery. Magnesium presents an interesting ductility-temperature relationship which explained 1. ( ) coming into play new slip systems as rises causing increased ductility, 2. b incidence reversal this trend.