Mechanical Properties and Fracture Behavior of High-Strength Steels

R. Musalek; P. Hausild; J. SieglJ. BenschJ. Slama

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Mechanical Properties and Fracture Behavior of High-Strength Steels

机译：的力学性能和断裂行为高强度钢

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Typical thicknesses of high-strength steels (HSS) sheets used in the car industry are inapplicable for standardized testing procedures. The aim of this study is to propose an appropriate methodology for testing and comparing of thin HSS sheets. Microstructures were observed by means of light and scanning electron microscopy. The modified Charpy impact tests and fracture toughness tests were used in order to compare the fracture properties of three different HSS sheets (Docol 1200 M, Multiphase 1200 and BTR 165). Ductile-to-brittle transition curves and tearing resistance (J - Δa) curves were measured. From the fracture toughness linked to the specimen thicknesses the value of fracture toughness K{sub}(Ic) was estimated. Fractographic analysis of broken specimens has revealed that due to the fine microstructure of mixed ferrite-martensite fracture mechanism remains ductile even at low temperatures (down to -100℃).

机译：高强度钢的典型厚度(HSS)表中使用的汽车行业是不适用的标准化的测试程序。本研究提出一个合适的方法测试和比较薄的高速钢表。光和扫描电子显微镜。修改后的夏比冲击试验和断裂为了比较韧度测试骨折三种不同的高速钢表的属性(Docol 1200, 1200年多相和BTR 165)。Ductile-to-brittle过渡曲线和撕裂电阻(J -Δ)曲线测定。断裂韧性与标本厚度断裂韧性的价值K{子}(Ic)估计。破碎的标本显示,由于混合ferrite-martensite的细微观结构断裂机理仍然甚至韧性较低温度(-100℃)。

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《Проблемы прочностиПроблемы прочности: на рус．укр．и анг．языках》 |2008年第1期|155-158|共4页
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R. Musalek; P. Hausild; J. SieglJ. BenschJ. Slama;
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正文语种英语
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fracture analysis; Coverlets; FRACTURE PROPERTIESIMPACT ENERGYFracture toughnessSteelsFractographyfracture toughness testingautomobile industryhigh strength steelsMechanical propertiesHigh strengthCharpy impact test;

机译：断口分析、床单、骨折PROPERTIESIMPACT ENERGYFracturetoughnessSteelsFractographyfracture韧性testingautomobile industryhigh强度steelsMechanical propertiesHigh strengthCharpy冲击试验;

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Mechanical Properties and Fracture Behavior of High-Strength Steels

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