一种镍基单晶高温合金的蠕变组织损伤对再蠕变行为的影响

doi:10.11901/1005.3093.2021.636

材料研究学报

2023, Vol. 37

Issue (6): 417-422 DOI: 10.11901/1005.3093.2021.636

研究论文

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一种镍基单晶高温合金的蠕变组织损伤对再蠕变行为的影响

张敏¹, 张思倩¹(

), 王栋², 陈立佳¹

^1.沈阳工业大学材料科学与工程学院沈阳 110870
^2.中国科学院金属研究所沈阳 110016

Creep Microstructure Damage and Influence on Re-creep Behavior for a Nickel-based Single Crystal Superalloy

ZHANG Min¹, ZHANG Siqian¹(

), WANG Dong², CHEN Lijia¹

^1.School of Material Science and Engineering, Shenyang University of Technology, Shenyang 110870, China
^2.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

引用本文:

张敏, 张思倩, 王栋, 陈立佳. 一种镍基单晶高温合金的蠕变组织损伤对再蠕变行为的影响[J]. 材料研究学报, 2023, 37(6): 417-422.
Min ZHANG, Siqian ZHANG, Dong WANG, Lijia CHEN. Creep Microstructure Damage and Influence on Re-creep Behavior for a Nickel-based Single Crystal Superalloy[J]. Chinese Journal of Materials Research, 2023, 37(6): 417-422.

全文: PDF(8905 KB) HTML

摘要:

分别在980℃/200 MPa和870℃/430 MPa条件下对镍基单晶高温合金DD413进行应变量为0.2%、0.5%和1%的蠕变中断实验，模拟在热-力耦合作用下这种合金的组织损伤特征并进行量化表征，对比研究了预应变对其蠕变性能的影响并建立了组织损伤参量-剩余蠕变性能的关系。结果表明：DD413合金的组织退化损伤，主要有γ'相体积分数的降低和γ'相筏化程度的提高。蠕变温度越高其组织损伤越严重，合金的再蠕变性能越差。与γ'相筏排化相比，γ'相体积分数的降低对合金蠕变性能的影响不大。

关键词 ：金属材料, 镍基单晶高温合金, 蠕变损伤, 量化表征, γ'相筏排化

Abstract：

Creep tests of Nickel-based single crystal superalloy DD413 were carried out by constant loads of 980℃/200 MPa and 870℃/430 MPa, while which then were terminated at plastic strain just reaches 0.2%, 0.5% and 1% respectively, so that to acquire the microstructure of the alloy by different creep damage states. Later on, the pre-strained alloys were further subjected to re-creep test again, so as to acquire their residual creep properties and to establish the relationship between different degraded microstructure and creep properties. Meanwhile the microstructure damage characteristics of DD413 alloy under thermal-mechanical coupling were simulated and quantitatively characterized. The results show that the degradated damage of DD413 alloy structure mainly includes the decrease of γ' phase volume fraction and the increase of γ' phase rafting degree. The higher the creep temperature, the more serious the microstructure damage, and the worse the alloy's re-creep performance. Compared with γ' phase rafting, the decrease of γ' phase volume fraction has little effect on the creep properties of the alloy.

Key words： metallic materials nickel-based single crystal superalloy creep damage quantified γ' phase rafting

收稿日期: 2021-11-12

ZTFLH:

TG132.3

基金资助:国家自然科学基金(52071219)

通讯作者: 张思倩，教授，sqzhang@alum.imr.ac.cn，研究方向为工程材料的疲劳与断裂

Corresponding author: ZHANG Siqian, Tel: 13700022372, E-mail: sqzhang@alum.imr.ac.cn

作者简介: 张敏，女，1997年生，硕士生

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https://www.cjmr.org/CN/10.11901/1005.3093.2021.636 或 https://www.cjmr.org/CN/Y2023/V37/I6/417

图1 DD413单晶高温合金热处理态的组织

图2 DD413单晶高温合金在980℃/200 MPa、870℃/430 MPa条件下的蠕变曲线

图3 DD413单晶高温合金横截面枝晶干的显微组织

表1 DD413单晶高温合金不同应变量处显微组织参数的定量表征

图4 DD413单晶高温合金纵截面枝晶干的显微组织

图5 DD413单晶高温合金在不同预应变后的再蠕变曲线

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