采用扫描电镜原位观察的方法，研究了在拉伸过程中X80管线钢中夹杂物的尺寸、形态对裂纹萌生与扩展的影响。结果表明：在拉伸过程中，夹杂物尺寸越大，夹杂物内萌生的裂纹数量越多，第1条裂纹萌生时的应力越小；夹杂物的形态和尺寸决定第1条裂纹的萌生位置；夹杂物的尺寸、形态对X80管线钢的拉伸强度无显著影响。
The effect of size and shape of inclusions in X80 pipeline steel on crack initiation and propagation during tensile test was studied by scanning electron microscopy in--situ observation. The results show that the larger the size of an inclusion, the more the number of cracks initiated in the inclusion, and the lower the stress of the first crack initiation. The shape and size of inclusions determined the location of the first crack initiation, and the size and shape of inclusions had not remarkable effect on the tensile strength of X80 pipeline steel.
参考文献
| [1] | 黄一新,尹雨群,李晶,余健.X70 管线钢中夹杂物控制试验研究[J].南钢科技与管理,2007(03):8-10. |
| [2] | 王习术,梁锋,曾燕屏,谢锡善.夹杂物对超高强度钢低周疲劳裂纹萌生及扩展影响的原位观测[J].金属学报,2005(12):1272-1276. |
| [3] | 仝珂,庄传晶,朱丽霞,李洋,瞿婷婷,邵晓东.高钢级管线钢微观组织特征与强韧性能关系的研究及展望[J].材料导报,2010(03):98-101. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%