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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers, Part B. Journal of engineering manufacture >A linear friction welding process model for Carpenter Custom 465 precipitation-hardened martensitic stainless steel: A weld microstructure-evolution analysis
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A linear friction welding process model for Carpenter Custom 465 precipitation-hardened martensitic stainless steel: A weld microstructure-evolution analysis

机译：Carpenter Custom 465沉淀硬化马氏体不锈钢的线性摩擦焊接工艺模型：焊缝组织演变分析

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摘要

Our recently developed fully coupled thermo-mechanical finite element-based process model for linear friction welding has been combined with a newly constructed microstructure-evolution model in order to predict the type, the extent, and the temporal evolution and spatial distribution of microstructural changes within different portions of the weld. The newly constructed microstructure-evolution model is based on the key physical metallurgy concepts and principles of the workpiece material and includes the basic thermodynamics and kinetics of various interacting and competing phase transformations, which may take place within the weld region. The microstructure-evolution model is subsequently applied to Carpenter Custom 465, H1000, a high-strength/high-corrosion resistance, precipitation-hardened martensitic stainless steel. Combined use of the thermo-mechanical process model and the workpiece material microstructure-evolution model enabled establishment of the basic relationships between the linear friction welding process parameters (e.g. friction pressure, reciprocating amplitude, reciprocating frequency, and forging pressure), temporal evolution and the spatial distribution of the as-welded material microstructure. Examination of the results yielded by the model clearly revealed: (a) the presence of three zones within the weld, that is, (1) a contact interface region, (2) a thermo-mechanically affected zone, and (3) a heat-affected zone and (b) the fact that the relative size and the extent of the associated microstructural changes are controlled by the selected linear friction welding process parameters. While there are no publicly available reports related to Carpenter Custom 465 linear friction welding behavior, to allow experimental validation of the attendant microstructure-evolution model, these findings are consistent with the results of our ongoing companion experimental investigation.
机译：我们最近开发的用于线性摩擦焊接的完全基于热机械有限元的过程模型已与新构建的微结构演化模型相结合，以预测微结构变化的类型，程度，时间演变和空间分布焊缝的不同部分。新构建的微观结构演化模型基于工件材料的关键物理冶金学概念和原理，并包括可能在焊接区域内发生的各种相互作用和竞争性相变的基本热力学和动力学。显微组织演化模型随后应用于高强度/高耐腐蚀，沉淀硬化的马氏体不锈钢Carpenter Custom 465，H1000。结合使用热机械过程模型和工件材料微结构-演化模型，可以建立线性摩擦焊接过程参数（例如，摩擦压力，往复幅度，往复频率和锻造压力），时间演变和焊接材料微观结构的空间分布。对模型产生的结果的检查清楚地表明：（a）焊缝中存在三个区域，即（1）接触界面区域，（2）受热机械影响的区域，以及（3）热量（b）相关微观组织变化的相对大小和程度受所选线性摩擦焊接工艺参数控制的事实。虽然没有与Carpenter Custom 465线性摩擦焊接行为有关的公开报告，但允许对伴随的微结构演化模型进行实验验证，但这些发现与我们正在进行的伴随实验研究的结果一致。

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