banded structure
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2021 ◽  
Vol 40 (7) ◽  
pp. 31-41
Author(s):  
Yan Li ◽  
Fangli Qiao ◽  
Hongyu Ma ◽  
Qiuli Shao ◽  
Zhixin Zhang ◽  
...  

2021 ◽  
Vol 1035 ◽  
pp. 492-498
Author(s):  
Ke Tong ◽  
Qing Liu ◽  
Bo Zhu ◽  
Shen Cong ◽  
Xu Ying Kang

The influence of banded structure on the performance of petroleum pipe was introduced firstly, and the characteristics and application scope of different rating methods of banded structure studied, and the banded structure in different specimens rated using this standards/methods. The banded structure rating of petroleum pipe steel requires proper and reasonable standards/methods for different microstructures. The current standards/methods could not integrate standard diagram comparison with calculation, and can not cover the banded structure rating for all pipeline steel microstructures. Therefore, in order to satisfy the inspection needs of petroleum pipe steel, a new rating standard is required to be established.


2020 ◽  
Vol 25 (4) ◽  
pp. 469-474
Author(s):  
Saleem Akhtar ◽  
A. Nusair Khan ◽  
Mushtaq Khan ◽  
Syed Husain Imran Jaffery ◽  
Arslan Saleem

2020 ◽  
Vol 237 ◽  
pp. 107244 ◽  
Author(s):  
Xiaochuan Zhang ◽  
Yan Wang ◽  
Ning Guo ◽  
Yong Wang ◽  
Rui Li ◽  
...  

Metals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1193 ◽  
Author(s):  
Nan Zhan ◽  
Zhengxing Hu ◽  
Xiaochuan Zhang

The effect of a ferrite/mixed phase banded structure on the fatigue crack growth behavior of pipeline steel has been investigated in this work. Constant stress-controlled fatigue tests were carried out on unilateral notch specimens in the longitudinal direction (LD) and the transverse direction (TD). The strain accumulation was measured by digital image correlation (DIC) method and the fatigue fracture morphology was analyzed. The results show that the banded structure in the LD would cause a wide range of crack deflections, especially in the early stage of fatigue crack growth, which results in a lower fatigue crack growth rate compared to the TD. At the later stage, due to the increase of the plastic zone of the crack tip, more ferrite in the crack growth path of the TD specimen is also beneficial for crack tip blunting, thereby slowing down the increase of the crack growth rate.


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