Analysis of thin-wall effect mechanism based on stress rupture properties and fracture characteristics of DD10 Ni-based single-crystal alloy

被引：1

作者：

Chen, Jiawan ^{[1
]}

Cao, Tieshan ^{[1
]}

Xu, Wei ^{[2
]}

Wu, Jiahui ^{[1
]}

Hu, Yebing ^{[1
]}

Cao, Lamei ^{[2
]}

Zhang, Yue ^{[2
]}

Cheng, Congqian ^{[1
]}

Zhao, Jie ^{[1
]}

机构：

[1] Dalian Univ Technol, Sch Mat Sci & Engn, 2 Linggong Rd, Dalian 116024, Peoples R China

[2] AECC Beijing Inst Aeronaut Mat, Beijing 100095, Peoples R China

来源：

MATERIALS CHARACTERIZATION | 2024年 / 218卷

关键词：

Ni-based single-crystal superalloys; Thin wall effect; XRM; Creep damage; Path-independent integral C; SPECIMEN THICKNESS; CREEP-PROPERTIES; SUPERALLOY; CMSX-4; BEHAVIOR; DEBIT;

D O I：

10.1016/j.matchar.2024.114494

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The stress rupture life and fracture characteristics of DD10 nickel-based single crystal alloy with different wall thicknesses were investigated. Stress rupture tests were performed on samples with wall thicknesses of 0.8 mm and 0.5 mm at 1000 degrees C/200 MPa and 1150 degrees C / 100 MPa. According to the experimental results, the thin wall effect was observed at both 1000 degrees C / 200 MPa and 1150 degrees C / 100 MPa. XRM (X-ray microscope) results show a larger proportion of large size cracks/voids in the 0.8 mm wall samples than in the 0.5 mm wall samples. Meanwhile, the C* values are smaller in the thicker wall samples than in the thinner wall samples for the same crack length. Combining the results of XRM and C* results speculate that a longer crack length and propagation time is required to achieve unstable propagation in thicker walled samples. This is one of the important reasons for the thin-wall effect.

引用

页数：11

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