论文标题
SLM制造的Hastelloy-X的微观结构敏感疲劳寿命预测模型
Microstructure sensitive fatigue life prediction model for SLM fabricated Hastelloy-X
论文作者
论文摘要
提出了基于CP-FFT的微观结构敏感疲劳寿命预测框架来研究SLM制造的Hastelloy-X。微结构通过RVE中的晶粒的形状，大小和方向分布进入模型，这些分布是由实验EBSD数据生成的。该框架已应用于用不同的多晶微观结构的两个不同方向构建的标本，并且仅使用两个实验进行校准，能够准确预测其疲劳寿命。该模型重现了在横向方向上建造的样品的高应力下发现的更好的疲劳性能，从而确定了这种各向异性在晶粒长宽比下的起源。
A microstructure-sensitive fatigue life prediction framework based on CP-FFT is proposed to study SLM fabricated Hastelloy-X. The microstructure enters in the model through the shape, size and orientation distributions of grains in the RVEs, which are generated from experimental EBSD data. The framework has been applied to specimens built in two different directions with different polycrystalline microstructures and is able to accurately predict their fatigue life, using just two experiments for calibration. The model reproduces the better fatigue performance found experimentally at high stresses for samples built in transverse direction, identifying the origin of this anisotropy in grain aspect ratios.
