Realization of High-performance Materials Through Control of Mezoscopic Structure of Materials

通过控制材料的介观结构实现高性能材料

基本信息

批准号：
10555031
负责人：
TOMIMTA Yoshihiro
金额：
$ 4.29万
依托单位：
Kobe University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

项目摘要

1.By means of precise tension tests conducted at the environmental temperatures of 77K to 373K, the constitutive equation that models for martensitic transformation depending on strain rate, temperature and applied stress system, was established.2.The computational strategy for the prediction of the deformation behavior of TRIP steels was then developed using the established constitutive equation3.Through comparison between the computationally predicted stress-strain relation for 77K and 293K, the validity of the proposed constitutive equation in predicting macroscopic nature of deformation behavior was verified. The local distribution of the martensitic phase over the ringed-notched specimen deformed under tension at 77K was predicted computationally and compared with the values obtained by a specially arranged experimental procedure using the micro-hardness testing device. The good correspondence between the two results confirms the validity of the present computational strategy.4.A computational simulation of the deformation behavior of TRIP steel bars without/with the ringed notch under uniaxial tension at 77K was performed. The accuracy of the computational results was verified through the comparison against the experimental results.5.A sort of inverse method was used to control the deformation processes to realize the improvement of the mechanical property of materials.

1.通过在77K至373K的环境温度下进行的精确张力测试的手段，建立了根据应变率，温度和施加的压力系统的马氏体转换模型的组成式方程。2。22.然后使用既定的固定等方程之间的7次计算范围的对比较进行了7次计算，以预测Trip Steels的计算策略。 293K，验证了拟议的构型方程在预测变形行为的宏观性质中的有效性。在计算时预测了马氏体阶段在77K处张力下变形的环形标本上的局部分布，并将其与使用微硬度测试设备通过特殊安排的实验程序获得的值进行了比较。两个结果之间的良好对应关系证实了当前的计算策略的有效性。4。进行了在77K时单轴张力下没有/带有环形缺口的行程钢条的变形行为的计算模拟。通过与实验结果进行比较来验证计算结果的准确性。5。一种反向方法用于控制变形过程，以实现材料的机械性能的改善。