CAJ | 학술논문

基于磁场的在线控制方法被认为是一种对材料微观结构变化进行监控的无损检测方法。这种方法对双相钢中马氏体相和铁素体相进行磁-机械耦合建模，其目的是建立材料宏观行为与微观特性之间的联系。基于能量最小化原理，提出了描述磁-机械行为的快速评估方法。仿真结果显示了双相钢中马氏体含量对其磁化强度和磁致伸缩的影响。结果表明马氏体含量越高的双相钢其磁致伸缩和磁化强度越小，因此越难于被磁化。该方法可以帮助我们理解马氏体含量对双相钢的磁化行为和磁致伸缩行为的影响。
기우자장적재선공제방법피인위시일충대재료미관결구변화진행감공적무손검측방법。저충방법대쌍상강중마씨체상화철소체상진행자-궤계우합건모，기목적시건립재료굉관행위여미관특성지간적련계。기우능량최소화원리，제출료묘술자-궤계행위적쾌속평고방법。방진결과현시료쌍상강중마씨체함량대기자화강도화자치신축적영향。결과표명마씨체함량월고적쌍상강기자치신축화자화강도월소，인차월난우피자화。해방법가이방조아문리해마씨체함량대쌍상강적자화행위화자치신축행위적영향。
Online control by magnetic method is considered as a nondestructive evaluation approach to detection of microstructure variation. Magnetic model used for each phase is based on a magneto-mechanical coupling model, which aims to build a relationship between macroscopic behavior and martensite content of DP steel. A fast estimation method is proposed to descript the magneto-mechanical behavior based on a minimization of the potential energy. Based on the model, a set of simulation is carried out which indicates that higher martensite content results in lower magnetization and magnetostrictive strain, thus it is more difficult to be magnetized for the DP steels with higher martensite contents. This kind of strategy could help us understand the effect of martensite contents on the magnetic behavior.