Characterisation of formability behaviour of multiphase steels by micromechanical modelling

被引：1
作者：
Vitoon Uthaisangsuk
Ulrich Prahl
Wolfgang Bleck
机构：
[1] RWTH Aachen University,Department of Ferrous Metallurgy
来源：
International Journal of Fracture | 2009年 / 157卷
关键词：
Multiphase steel; Microstructure; Fracture mechanisms; Representative volume element; GTN damage model;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Multiphase steels are new Advanced High Strength Steels (AHSS), which have been developed for the automobile industry for the purpose of reducing of car body weight. These steels offer an excellent combination of high strength and large elongation due to the coexistence of harder and softer phases in their microstructure. The advantageous properties of multiphase steels can be utilised by regulating the type, amount, formation and spatial distribution of the different constituent phases. To describe the influences of the heterogeneous microstructure on the mechanical properties and the complex fracture mechanisms, an approach is presented using Representative Volume Elements (RVEs) on a micro level. Three dimensional RVE simulations were conducted under considerations of metallographic analysis for a Dual Phase (DP) steel and a Transformation-Induced Plasticity (TRIP) steel. The Gurson–Tvergaard–Needleman (GTN) damage model was applied to investigate the local crack initiation in steel sheets during various forming processes. In conclusion, a failure prediction based on microstructure is proposed for the material characterisation in sheet metal forming of multiphase steels.
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页码：55 / 69
页数：14
相关论文
共 65 条
[1]  
Al-Abbasi FM(2003)Micromechanical modeling of dual phase steels Int J Mech Sci 45 1449-1465
[2]  
Nemes JA(1969)A dislocation model for the stress–strain behaviour of polycrystalline α-Fe with special emphasis on the variation of the densities of mobile dislocations Mater Sci Eng 5 193-200
[3]  
Bergström Y(2002)Micro-mechanical modelling of ductile damage and tearing—results of a European numerical round robin Fatigue Fract Eng Mater Struct 25 363-384
[4]  
Bernauer G(2006)Microstructure-based model for the static mechanical behaviour of multiphase steels Acta Mater 54 1443-1456
[5]  
Brocks W(2003)On the practical application of the cohesive model Eng Fract Mech 70 1963-1987
[6]  
Bouquerel J(2007)Sheet metal testing and flow curve determination under multiaxial conditions Adv Eng Mater 9 987-994
[7]  
Verbeken K(2004)A model for damage coalescence in heterogeneous multi-phase materials Acta Mater 52 5255-5263
[8]  
De Cooman BC(1987)Ductile fracture J Phys Chem Solids 48 1035-1074
[9]  
Cornec A(1976)Controlled rolling of acicular ferrite steel plate Rev Metall 73 143-174
[10]  
Scheider I(1968)Study on the formability of steel sheets Yawata Tech Rep 284 140-141
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