1. 西安交通大学金属材料强度国家重点实验室,西安,710049
2. 中国石油集团石油管工程技术研究院,西安,710065
3. 中国石油天然气集团公司石油管工程重点实验室,西安,710065
网络首发:2011-09-10,
纸质出版:2011
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熊庆人 1, 2, 3, 等. X100直缝埋弧焊管断裂韧性的裂纹尖端张开位移试验研究[J]. 西安交通大学学报, 2011,45(9):119-124.
Fracture Toughness Investigation of X100 Longitudinal Submerged Arc Welded Pipe via Crack Tip Opening Displacement Test[J]. 2011, 45(9): 119-124.
为了检验X100直缝埋弧焊管的断裂韧性
采用三点弯曲多试样法
在室温、-10 ℃和-30 ℃下对该焊管的母材、热影响区和焊缝部位进行了裂纹尖端张开位移(CTOD)试验.测试结果表明:在同一温度下
CTOD试验的表观启裂值δ
0.05
、条件启裂值δ
i
和最大载荷值δ
m
的分布规律为母材最好
焊缝次之
热影响区最差; 采用裂纹扩展阻力和撕裂模量表征的分布规律为母材最好
热影响区次之
焊缝最差; 焊接热影响区组织中含有大量呈块状分布的铁素体
而粒状贝氏体等增强相的含量较少
这会造成其韧性下降
使焊管出现局部失稳现象.
Three-point bend testing method was employed in the crack tip opening displacement(CTOD)test to investigate the fracture toughness of base metal
heat affected zone(HAZ)
and weld of an X100 longitudinal submerged arc welded(LSAW)pipe. The results show that at the same temperature
the δ
0.05
δ
i
and δ
m
in the X100 LSAW pipe distribute as: base metal>weld bead>HAZ; and the crack propagation resistance and tear modulus distribute as: base metal>HAZ>weld bead. Further analysis shows that the toughness of HAZ of X100 LSAW pipe closely relates with its microstructure. Large amount of polygonal ferrite in HAZ microstructure and less content of reinforcement phases
such as granular bainite
can lead to the decrease in fracture toughness
especially at low temperature
and the emergence of local instability.
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Al2O3粉末对ZrO2-TiB2-Al2O3纳米复合陶瓷材料力学性能的影响. 西安交通大学学报, 2011, 45(3): 125-128.
高效搅拌摩擦钎焊制备铝/钢双金属复合板的可行性研究. 西安交通大学学报, 2010, 44(12): 93-98.
超轻X型点阵芯体金属夹层板的剪切疲劳机制.西安交通大学学报, 2010, 44(11): 61-65.
石油膨胀套管的力学性能及膨胀后的残余应力. 西安交通大学学报, 2010, 44(7): 90-94.
焊缝缺陷类型识别方法的研究. 西安交通大学学报, 2010, 44(7): 100-103.
大型厚壁筒体斜插弯管接头应力特征有限元快速预测. 西安交通大学学报, 2010, 44(3): 68-71.
焊缝缺陷的水淹没分割算法.西安交通大学学报, 2010, 44(3): 90-94.
有机包覆对磁性聚乳酸复合材料力学和介电性能的影响. 西安交通大学学报, 2009, 43(12): 120-124.
铝基复合材料的活性液相扩散焊新工艺. 西安交通大学学报, 2009, 43(11): 71-74.
焊后多次正火对超细晶粒钢热影响区组织与硬度的影响. 西安交通大学学报, 2008, 42(1): 65-69.
一种低合金低温铸钢及其组织与性能. 西安交通大学学报, 2008, 42(7): 875-879.
添加纳米TiO2对Mg17Al12吸氢性能的影响. 西安交通大学学报, 2008, 42(5): 647-650.
Lasub1-xYxNi/sub4.8Mnsub0.2合金的贮氢性能研究. 西安交通大学学报, 2008, 42(3): 359-363.
球磨处理对LiAlH4放氢动力学的影响. 西安交通大学学报, 2008, 42(2): 256-260.
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