最近几年来,在测试方法学领域里,已采用恒定的较低延伸速度来研究应力腐蚀开裂性能1).这种方法被证实宜于比较可靠和迅速地认识应力腐蚀开裂敏感的合金系列以及了解其腐蚀机理.例如从钛合金可取得新的认识,结构钢的也表明,被认为无害的离子,比如碳酸氢盐,能够引起应力腐蚀4)、5).对恒定延伸速度法的说服力有时也作很尖锐的评论6),但与其它检验方法相比,对铝合金来说 In recent years in the field of test methodologies, a constant lower extension speed has been used to study the stress corrosion cracking behavior.1) This method has proven to be more reliable and rapid to recognize stress corrosion cracking-sensitive alloy families and to understand For example, new understandings can be obtained from titanium alloys, and structural steels have also shown that ions considered innocuous, such as bicarbonate, can cause stress corrosion.4) 5) Persuasion toward a constant rate of elongation Sometimes very sharp comment 6), but compared with other test methods, for aluminum alloy