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Cyclic plasticity modeling and fatigue life assessment of the recasting material of a nickel-based superalloy induced by laser manufacturing
International Journal of Fatigue ( IF 6 ) Pub Date : 2021-01-29 , DOI: 10.1016/j.ijfatigue.2021.106154
Tinglian Zhang , Jingyu Sun , Huang Yuan

In the present work, the laser recasting superalloy was experimentally and computationally investigated to quantify the effects of laser manufacturing. Local stresses and strains in recasting specimens were tested to establish the fatigue life assessment. A modified plasticity model was used to describe the cyclic plasticity behavior under multiaxial loading conditions. With the help of finite element computations and instrumented indentation, the local mechanical property of the recasting material can be identified. It is confirmed that the mechanical strength of the recasting material reaches nearly 50% of the base material, whereas its fatigue life is about 1/10 of the base material.



中文翻译:

激光制造引起的镍基高温合金重铸材料的循环塑性建模和疲劳寿命评估

在当前的工作中,对激光铸造超合金进行了实验和计算研究,以量化激光制造的效果。对重铸试样中的局部应力和应变进行了测试,以建立疲劳寿命评估。修改后的可塑性模型用于描述多轴载荷条件下的循环可塑性行为。借助有限元计算和仪器压痕,可以识别重铸材料的局部机械性能。可以确认,再铸材料的机械强度达到基材的近50%,而疲劳寿命约为基材的1/10。

更新日期:2021-03-01
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