一种新型980 MPa高强钢的低温四点弯曲断裂行为

曹睿; 闫英杰; 李广; 杜挽生; 彭云; 田志凌; 陈剑虹

一种新型980 MPa高强钢的低温四点弯曲断裂行为

1.
兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室, 兰州 730050
2.
西安交通大学金属材料强度国家重点实验室, 西安 710049
3.
钢铁研究总院结构材料研究所, 北京 100081

基金项目:

国家自然科学基金资助项目(50905081,50671047)

西安交通大学金属材料强度国家重点实验室开放研究项目(201011001)

详细信息

作者简介:
曹睿(1977-),女,甘肃临兆人,副教授, 博士。

中图分类号: TG301
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出版历程
- 收稿日期: 2010-12-09
- 刊出日期: 2011-04-19

Four-Point Bending Fracture Behaviors at Low Temperatures of A New 980 MPa High Strength Steel

摘要

摘要: 在不同试验温度(-196~200 ℃)下对一种新型980 MPa高强钢进行了带缺口试样的四点弯曲试验, 并用扫描电镜对其断口进行了观察,研究了该钢的断裂行为。结果表明:随着试验温度升高, 该钢的韧性逐步提高; 在-100 ℃及以上温度时, 该钢的断裂形态为韧性断裂, 韧性较好; 在-100 ℃以下, 逐渐由韧性向脆性断裂过渡, 在-196 ℃时, 为脆性准解理断裂。
- 980 MPa高强钢 /
- 断裂机理 /
- 四点弯曲
Abstract: Four-point bending tests for the sample with notch at different temperatures (-196-200 ℃) were performed on a new 980 MPa high strength steel. The fracture surface was observed by scanning electron microscopy. The fracture behaviors of the high strength steel were investigated. The results show that with increasing the test temperature, the toughness of the steel gradually increased. It was ductile fracture at -100 ℃ or above, and the toughness was good. The fracture feature transformed from ductile fracture to brittle fracture at below -100 ℃. It was brittle quasi-cleavage fracture at -196 ℃.
- 980 MPa high strength steel /
- fracture mechanism /
- four-point bending

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参考文献(10)

[1]	ECHEVERR A, RODRIGUEZ-IBABE J M. Brittle fracture micromechanisms in bainitic and martensitic microstructures in a C-Mn-B steel[J].Scripta Materialia,1999,41(2):131-136.
[2]	ZHANG X Z, KNOTT J. The statistical modelling of brittle fracture in homogeneous and heterogeneous steel microstructures[J].Acta Mater,2000,48(9):2135-2146.
[3]	TANGUY B, BESSON J, PIQUES R,et al. Ductile to brittle transition of an A508 steel characterized by Charpy impact test: Part II: modeling of the Charpy transition curve[J].Engineering Fracture Mechanics,2005,72(3):49-72.
[4]	BHADESHIA H K D, EDMONDS D V. Bainite in silicon steels: new composition-property approach, part 1[J].Met Sci,1983,17:411-419.
[5]	BHADESHIA H K D, EDMONDS D V. Bainite in silicon steels: new composition-property approach, part 2[J].Met Sci,1983,17:420-428.
[6]	MIIHKINEN V T T, EDMONDS D V. Tensile deformation of two experimental high-strength bainitic low-alloy steels containing silicon[J].Material Science and Technology,1987,3:432-440.
[7]	MIIHKINEN V T T, EDMONDS D V. Fracture toughness of two experimental high-strength bainitic low-alloy steels con-taining silicon[J].Material Science and Technology,1987,3:441-449.
[8]	闫英杰, 曹睿, 杜挽生, 等.一种新型980 MPa高强钢在不同温度下的拉伸断裂试验[J].材料科学与工程学报, 2009, 27(2): 246-249.
[9]	曹睿, 闫英杰, 杜挽生, 等.一种新型980 MPa高强钢的弯曲断裂机理[J].材料科学与工程学报, 2009, 27(5): 696-700.
[10]	王国珍.低合金钢细观解理断裂应力σf及断裂模型的研究[D].兰州:甘肃工业大学, 2002.

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一种新型980 MPa高强钢的低温四点弯曲断裂行为

作者简介: 曹睿(1977-),女,甘肃临兆人,副教授, 博士。

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Four-Point Bending Fracture Behaviors at Low Temperatures of A New 980 MPa High Strength Steel

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作者简介:
曹睿(1977-),女,甘肃临兆人,副教授, 博士。