精品文档---下载后可任意编辑GH4169 合金惯性摩擦焊接过程动态再结晶行为的数值模拟的开题报告摘要：GH4169 合金是一种重要的高强高温合金，广泛应用于航空、航天及石油化工等高端领域。在高温过程中，GH4169 合金往往会发生变形，进而对其性能产生影响。为了讨论 GH4169 合金的变形行为，本文采纳数值模拟的方法对 GH4169 合金惯性摩擦焊接过程动态再结晶行为进行探究。首先，针对 GH4169 合金的化学成分、微观结构以及力学性能进行了简要介绍，探讨了 GH4169 合金的热变形机理。然后，通过有限元模拟方法对 GH4169 合金惯性摩擦焊接过程进行了模拟，分析了焊接过程中变形量、温度分布等参数的变化。最后，采纳经验公式模拟 GH4169 合金动态再结晶行为，讨论其晶粒尺寸和形貌的变化。讨论结果表明，GH4169 合金在焊接过程中会受到很大的热变形影响，局部温度会出现显著的升高，在高温下容易发生再结晶。动态再结晶过程中，晶粒尺寸呈现出先增大后减小的趋势，形貌也发生了明显的变化。本文的讨论结果对讨论 GH4169合金的动态再结晶行为提供了一定的参考价值。关键词：GH4169 合金；惯性摩擦焊接；动态再结晶；数值模拟Abstract:GH4169 alloy is an important high-strength and high-temperature alloy, widely used in high-end fields such as aerospace and petroleum chemistry. During high-temperature processes, GH4169 alloy often undergoes deformation, which affects its performance. In order to study the deformation behavior of GH4169 alloy, this paper uses numerical simulation method to explore the dynamic recrystallization behavior of GH4169 alloy in the inertia friction welding process.Firstly, the chemical composition, microstructure, and mechanical properties of GH4169 alloy are briefly introduced, and the hot deformation mechanism of GH4169 alloy is discussed. Then, the finite element simulation method is used to simulate the inertia friction welding process of GH4169 alloy, and the changes of deformation amount, temperature distribution and other parameters during the welding process are analyzed. Finally, the ...
