基本信息
项目批准号：51775371
申请代码：E0508
项目名称：高性能轻合金搅拌摩擦增材制造成形机理及组织控制
项目负责人：杨新岐
依托单位：天津大学
研究期限：2018-01-01 至 2021-12-31
资助经费：60.0（万元）
项目摘要
中文摘要：
针对高性能铝镁轻质合金的搅拌摩擦增材制造工艺过程：研究搅拌摩擦增材成形机理、组织控制及力学性能的应用基础问题。具体包括搅拌摩擦增材成形理论基础及工艺原理；搅拌摩擦增材过程中热-力耦合特征及增材热循环变化规律；各种工艺参数及热输入、应变及应变速率与增材成形的相互影响机制；增材母材组织成分、尺寸形状及热处理状态与增材成形的相互作用规律，增材焊缝区及界面的焊接缺陷形成机制、组织演变及非均质组织表征与控制规律；增材焊缝区与界面的断裂韧度及疲劳强度演变规律，增材焊缝区及界面缺陷敏感性、断裂模式及失效机制、影响增材焊缝区断裂韧度和疲劳强度的内在因素及机制、控制与改善搅拌摩擦增材焊缝综合性能的材料冶金和工艺措施。研究结果包括搅拌摩擦增材成形基础理论、工艺原理及实现装置、组织控制及力学性能变化规律，为实现工业化搅拌摩擦增材制造技术的开发与应用提供重要基础。
英文摘要：
Focusing on the currently advanced friction stir additive manufacturing(FSAM) of aluminum and magnesium light alloys with high properties, we investigate the application fundamental issues of forming mechanism, microstructure control and mechanical properties during the friction stir additive manufacturing which are included as follows. The forming theory fundamentals and specific processing principles of friction stir additive manufacturing; the varying laws of friction thermal-mechanical coupling features and additive thermal cycles during friction stir additive manufacturing; the interactive and influencing rules between the processing parameters and heat inputs, strains and strain rates with the additive manufacturing processes; the interactive and influencing rules between the additive base material compositions, geometries and heat treatment conditions with the additive manufacturing processes; the forming mechanism of welding defects, the evolution of microstructures and the control rules and representations of inhomogeneous microstructures in the additive welds and layer interface zones; the evolution rules of fatigue strength and fracture toughness in the additive welds and layer interface zones; the susceptibility to defects, fracture modes and failure mechanisms in the additive welds and layer interface zones; the effects of inherent factors and mechanisms on the fatigue and fracture performances of additive weld regions; the material metallurgical and processing methods to control and improve the performances of friction stir additive manufacturing welds. The research results include the fundamental theory of friction stir additive manufacturing, the principle of processing and the specific devices, the varying rules of mechanical properties and microstructure control, which should provide the important foundation of developing the industrial application of friction stir additive manufacturing technology.
                                                                                                                                                                                                 ——来自https://kd.nsfc.gov.cn/