一种确定制造过程中铁素体和马氏体相应力应变曲线的独特方法

IF 1.5 4区 材料科学 Q3 ENGINEERING, MECHANICAL Journal of Engineering Materials and Technology-transactions of The Asme Pub Date : 2022-10-20 DOI:10.1115/1.4056033
Silvie M Tanu Halim, E. Ng
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引用次数: 0

摘要

有限元方法已被广泛用于模拟加工过程中材料微观结构的影响。然而,单个微观结构相应力-应变曲线的确定是实验密集的,并且难以测量。此外,这些曲线还受到热处理工艺、化学成分和单个微观结构相的百分比的影响。本文的目的是开发和验证微机械自适应迭代算法,以计算双相钢的单个铁素体和马氏体塑性行为。该方法需要来自具有三个不同马氏体体积分数(Vm)的相同材料的至少三个实验应力-应变曲线。需要两条具有不同Vm的应力-应变曲线来初始化迭代算法,以预测铁素体和马氏体的单独塑性行为。第三条应力-应变曲线用于验证给定DP钢的单个铁素体和马氏体的塑性行为。接下来,用0.088%C和0.1%C两种不同牌号的DP钢对该算法进行了验证。验证结果表明,该方法具有一致的预测能力,预测结果与实验结果的最大差异为6.5%马氏体体积分数(Vm)。
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A Unique Method to Determine Ferrite and Martensite Phase Stress Strain Curve for Manufacturing Process
Finite element (FE) methods have been extensively used to simulate the effects of material's microstructure during the machining processes. However, determination of the individual microstructure phase stress strain curves is experimentally intensive and difficult to measure. Furthermore, these curves were also affected by heat treatment processes, chemical composition, and the percentage of individual microstructure phases. The objective of this paper is to develop and validate the Micromechanical Adaptive Iteration Algorithm to calculate the individual ferrite and martensite plastic behavior for dual phase (DP) steel. This method requires a minimum of three experimental stress-strain curves from the same material with three different martensite volume fractions (Vm). Two of the stress-strain curves with different Vm is required to initialize the iteration algorithm to predict the individual plastic behavior of ferrite and martensite. The third stress strain curve was used to validate the plastic behavior of individual ferrite and martensite for the given DP steel. Following on from here, the proposed algorithm was validated with two different grades of DP steel with 0.088%C and 0.1%C. Validation results shows that the approach has consistent prediction capabilities and the maximum difference observed between predicted and experimental results was 6.5%. The simulated results also shows that the degree of strain partitioning between ferrite and martensite decreases with increasing volumetric fraction of martensite (Vm).
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来源期刊
CiteScore
3.00
自引率
0.00%
发文量
30
审稿时长
4.5 months
期刊介绍: Multiscale characterization, modeling, and experiments; High-temperature creep, fatigue, and fracture; Elastic-plastic behavior; Environmental effects on material response, constitutive relations, materials processing, and microstructure mechanical property relationships
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