Micromechanism of Decrease of Impact Toughness in Coarse-Grain Heat-Affected Zone of HSLA Steel with Increasing Welding Heat Input

被引：58
作者：
Cao, R. [1 ,2 ]
Li, J. [1 ,2 ]
Liu, D. S. [3 ]
Ma, J. Y. [1 ,2 ]
Chen, J. H. [1 ,2 ]
机构：
[1] Lanzhou Univ Technol, State Key Lab Gansu Adv Proc & Recycling Nonferro, Minist Educ, Lanzhou 730050, Peoples R China
[2] Lanzhou Univ Technol, Key Lab Nonferrous Met Alloys, Minist Educ, Lanzhou 730050, Peoples R China
[3] Shasteel, Inst Res Iron & Steel, Zhangjiagang 215623, Jiangsu, Peoples R China
来源：
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2015年 / 46A卷 / 07期
关键词：
MICROSTRUCTURE; SIZE;
D O I：
10.1007/s11661-015-2916-2
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This paper analyzes the micromechanism of decrease of impact toughness with increasing the welding heat input in coarse-grain heat-affected zone (CGHAZ) of a low-alloy high-strength ship-building steel plate. By comparing the microstructures, measuring the extending length of the fibrous crack, identifying the critical event of cleavage fracture, measuring the critical length, and calculating the local cleavage fracture stress sigma (f), and then using the basic principles of the micromechanism of cleavage fracture, this work reveals the essential causes of deteriorated toughness in the CGHAZ of high-strength steel welded joints.
引用
收藏
页码：2999 / 3014
页数：16
相关论文
共 25 条
  • [21] Smith E., 1968, INT J FRACTURE, V94, P33
  • [22] Microstructural, compositional, and microhardness variations across a gas-metal arc weldment made with an ultralow-carbon consumable
    Spanos, G
    Moon, DW
    Fonda, RW
    Menon, ESK
    Fox, AG
    [J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2001, 32 (12): : 3043 - 3054
  • [23] Effect of fast cooling on microstructure and toughness of heat affected zone in high strength offshore steel
    Yan, H. Q.
    Wu, K. M.
    Wang, H. H.
    Li, L.
    Yin, Y. Q.
    Wu, N. C.
    [J]. SCIENCE AND TECHNOLOGY OF WELDING AND JOINING, 2014, 19 (04) : 355 - 360
  • [24] Characteristic of martensite-austenite constituents in coarse grained heat affected zone of HSLA steel with varying Al contents
    Yu, L.
    Wang, H. H.
    Hou, T. P.
    Wang, X. L.
    Wan, X. L.
    Wu, K. M.
    [J]. SCIENCE AND TECHNOLOGY OF WELDING AND JOINING, 2014, 19 (08) : 708 - 714
  • [25] Austenite grain growth and microstructure control in simulated heat affected zones of microalloyed HSLA steel
    Zhang, Lei
    Kannengiesser, Thomas
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2014, 613 : 326 - 335
123