One of the challenges in computational design of pre-alloyed powders for sintering is the absence of predictive, efficient, and fast acting models that enable the design space of alloys to be tractable. This study presents an efficient and predictive model to simulate the densification as well as shape distortion of pre-alloyed powder compacts during supersolidus liquid phase sintering (SLPS). The model combines the generalized viscous theory of sintering with microstructural models for diffusional creep accommodated by viscous grain boundary sliding. Critical model parameters are obtained from thermodynamic modeling based on the calculation of phase diagrams (CalPhaD) and simulations of diffusional transformations in metals. The model is validated by comparing simulation results with experimental data from the literature for various types of engineering alloys. In addition, a processing window for defect free sintering of samples is presented by defining a microstructural softening parameter for a sintering body. The model can be used in the design of pre-alloyed powders for SLPS within the context of an integrated computational materials engineering (ICME) frameworks.

用于烧结的预合金粉末计算设计的挑战之一是缺乏预测性、高效和快速作用的模型，使合金的设计空间易于处理。本研究提出了一种有效的预测模型，用于模拟超固相液相烧结 (SLPS) 过程中预合金粉末压块的致密化和形状变形。该模型将广义粘性烧结理论与粘性晶界滑动适应的扩散蠕变微观结构模型相结合。关键模型参数是从基于相图 (CalPhaD) 计算和金属扩散转变模拟的热力学模型中获得的。通过将模拟结果与文献中各种工程合金的实验数据进行比较，验证了该模型。此外，通过定义烧结体的微观结构软化参数，提出了样品无缺陷烧结的加工窗口。该模型可用于在集成计算材料工程 (ICME) 框架的背景下设计 SLPS 的预合金粉末。