690 MPa级高强韧低碳微合金建筑结构钢设计及性能
朱雯婷1, 崔君军1, 陈振业1,2, 冯阳1, 赵阳3, 陈礼清1(
)
)
Design and Performance of 690 MPa Grade Low-Carbon Microalloyed Construction Structural Steel with High Strength and Toughness
ZHU Wenting1, CUI Junjun1, CHEN Zhenye1,2, FENG Yang1, ZHAO Yang3, CHEN Liqing1()
)
图13. 实验用钢在不同温度下1/4厚度处断口附近形貌和裂纹扩展的EBSD像
Fig.13. EBSD images of the tested steel at 1/4 thickness showing morphologies and cracks propagation paths underneath the fracture surface at impact temperatures of -20oC (a) and -40oC (b) (The black lines and red lines denote the high angle grain boundaries (misorientation angle > 15°) and low angle grain boundaries (misorientation angle 2°-15°), respectively)
