Unveiling the orientation sensitivity of creep life in near [001] oriented Ni-based single crystal superalloys at intermediate temperatures

IF 9.4 1区材料科学 Q1 ENGINEERING, MECHANICAL

International Journal of Plasticity Pub Date : 2024-06-13 DOI:10.1016/j.ijplas.2024.104035

Pengfei Qu, Wenchao Yang, Qiang Wang, Chen Liu, Jiarun Qin, Jun Zhang, Lin Liu

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引用次数: 0

Abstract

Although blades with a deviation angle of less than 15° between the blade stacking axis and the [001] orientation are qualified in the industry, the creep life of samples near [001] orientation exhibits significant anisotropy at intermediate temperatures. Those crystals having orientations within 15° from precise [001] exhibited significantly longer lives when their orientations were closer to the [001]-[101] boundary of the stereographic triangle than to the [001]-[111] boundary. Here, we first investigated the orientation rotation path of specimens near [001] orientation during creep at 750 °C/750 MPa, then revealed the dominant slip systems at different creep stages. Subsequently, we evaluated the effect of orientation deviation from precise [001] on creep properties. Finally, our research revealed the orientation sensitive mechanism of creep life in near [001] oriented Ni-based single crystal superalloys at intermediates.

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揭示近 [001] 取向镍基单晶超合金在中温条件下蠕变寿命的取向敏感性

虽然叶片堆叠轴线与[001]取向之间的偏差角度小于 15°的叶片在工业上是合格的，但在中间温度下，[001]取向附近样品的蠕变寿命表现出明显的各向异性。取向与精确[001]方向相差 15°以内的晶体，当其取向更接近立体三角形的[001]-[101]边界而非[001]-[111]边界时，其寿命明显更长。在此，我们首先研究了试样在 750 °C/750 MPa 蠕变过程中靠近 [001] 方向的取向旋转路径，然后揭示了不同蠕变阶段的主要滑移系统。随后，我们评估了取向偏离精确[001]对蠕变特性的影响。最后，我们的研究揭示了近[001]取向镍基单晶超合金在中间阶段蠕变寿命的取向敏感机制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Plasticity 工程技术-材料科学：综合

CiteScore

15.30

自引率

26.50%

发文量

256

审稿时长

46 days

期刊介绍： International Journal of Plasticity aims to present original research encompassing all facets of plastic deformation, damage, and fracture behavior in both isotropic and anisotropic solids. This includes exploring the thermodynamics of plasticity and fracture, continuum theory, and macroscopic as well as microscopic phenomena. Topics of interest span the plastic behavior of single crystals and polycrystalline metals, ceramics, rocks, soils, composites, nanocrystalline and microelectronics materials, shape memory alloys, ferroelectric ceramics, thin films, and polymers. Additionally, the journal covers plasticity aspects of failure and fracture mechanics. Contributions involving significant experimental, numerical, or theoretical advancements that enhance the understanding of the plastic behavior of solids are particularly valued. Papers addressing the modeling of finite nonlinear elastic deformation, bearing similarities to the modeling of plastic deformation, are also welcomed.