in效应的CTOD值下降几倍到十几倍.研究发现Pop-in效应的产生是由于裂纹尖端出现局部脆化现象,如裂纹尖端局部出现夹渣缺陷、组织中出现沿晶网状析出物等;多层多道焊时其中一道焊缝出现粗大的侧板条铁素体和贝氏体,裂纹尖端恰好落在粗大脆性组织处且裂纹扩展方向与脆性组织生长方向一致时,易导致局部脆化产生Pop-in效应...
Small crack-intitiation-arrest events so called Pop-ins often occur at CTOD tests for weldments and CTOD values of such Pop-ins ar usually very small in co... K Arimochi,K Isaka - 《Transactions of the Japan Welding Society》 被引量: 3发表: 1989年 Engineering Critical Assessment in S...
In addition, a high-sensitivity strain gauge was attached to the back of the CT specimen to measure back strain for estimating crack opening force Pop. The general arrangement of the test setup is shown in Figure 2, and the detail of the CT specimen is shown in Figure 3. Figure 2. ...
In addition, a high-sensitivity strain gauge was attached to the back of the CT specimen to measure back strain for estimating crack opening force Pop. The general arrangement of the test setup is shown in Figure 2, and the detail of the CT specimen is shown in Figure 3. Figure 2. ...