基本信息
项目批准号：11572074
申请代码：A0813
项目名称：钛合金搅拌摩擦焊接构件显微结构及力学性能预测中的计算方法
项目负责人：张昭
依托单位：大连理工大学
研究期限：2016-01-01 至 2019-12-31
资助经费：56.0（万元）

项目摘要
中文摘要：
通过对钛合金搅拌摩擦焊接材料行为的研究及所建立的搅拌摩擦焊接晶粒预测模型，界定钛合金搅拌摩擦焊接过程中不同的焊接区域并解释其形成机理，建立焊接参数与焊件区域之间的关联。基于Johnson-Mehl-Avrami模型建立搅拌摩擦焊接沉淀相计算模型，进一步结合元胞自动机法建立考虑再结晶因素的晶粒生长和沉淀相演化耦合模型，结合基于沉淀相变化的应变硬化模型，构建钛合金搅拌摩擦焊接力学性能预测模型。以图形返回算法为基础，建立微观元胞自动机模型和力学性能预测模型与宏观热力耦合模型的关联，系统性研究宏微观参量之间的相互影响关系，发展宏微观一体化的计算方法，进一步建立和完善搅拌摩擦焊接的数值模型和计算方法。
英文摘要：
The formation of the different welding zones can be simulated based on the numerical investigation on the material flows and the numerical model of grain sizes in friction stir welding (FSW) of titanium alloy. The mechanism for the different welding zones can be then explained and the relation between the welding parameters and the welding zones can be established. The computational model of the precipitation in FSW can be established based on the Johnson-Mehl-Avrami model. The coupled model with consideration of both the grain growth and the precipitations can be built based on the cellular automata model. The mechanical properties of the weld can be then predicted based on the strain hardening model with consideration of the precipitation evolutions. The cellular automata model and the numerical model for prediction of mechanical properties in micro scale can be connected to the thermo-mechanical model of FSW in macro scale. The multi scale computational method can be then developed. The computational methods and the numerical models of FSW can be further improved.
 
                                                                                                                                                                               ——来自https://kd.nsfc.gov.cn/