高强高韧合金断裂韧性测试技术的问题探讨  

Study on Fracture Toughness Testing Technique of High Strength and Toughness Alloy

作　　者：郑国华[1] 张欣耀[1] 罗先甫[1] 张利娟[1] 赵阳[1] 

机构地区：[1]中国船舶重工集团公司第七二五研究所,河南洛阳471023

出　　处：《材料开发与应用》2015年第3期84-88,共5页Development and Application of Materials

摘　　要：研究了用现有ASTM、BS、GB标准评价高强高韧合金断裂韧性时存在的不适用问题,提出了修订现有标准的方法。提出了建立高强高韧合金发生较大范围屈服时的临界试样厚度BC和Rp0.2/E的对应关系;对由JIC转化获得的KIC进行了误差分析;提出了采用正交试验法确定单试样法J积分试验中的最佳试验参数。Based on that there exist unapplicable problems for high strength and toughness alloy in national and international fracture toughness testing standards（ GB,ASTM and BS）,a set of methods were presented and recommended for amendment of the standards. The relationship between critical thickness BCof large scale yielding and Young＇s modulus（ E） was established for high strength and toughness alloy. Specially,the errors of KICby the JICconversion formula was analyzed. Finally,the optimal parameters of single specimen method are determined by the orthogonal test method.

关 键 词：临界厚度 误差分析 正交试验法 

分 类 号：TG115.57[金属学及工艺—物理冶金]