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Thin-wall effects on stress rupture property of single crystal superalloy investment cast specimen
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Liang YANG1, Ke LI2, Zefeng YU2, Shixin TAN2, Xiaoming HUANG2, Jiarong LI1, Shizhong LIU1, Mei HAN1
Journal of Materials Engineering | 2026, 54(7) : 192 - 200
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Journal of Materials Engineering | 2026, 54(7): 192-200
• RESEARCH ARTICLE •
Thin-wall effects on stress rupture property of single crystal superalloy investment cast specimen
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Liang YANG1, Ke LI2, Zefeng YU2, Shixin TAN2, Xiaoming HUANG2, Jiarong LI1, Shizhong LIU1, Mei HAN1
Affiliations
  • 1.AECC Science and Technology on Advanced High Temperature Structural Materials Laboratory，Beijing Institute of Aeronautical Materials，Beijing 100095，China
  • 2.AECC South Industry Co. ，Ltd. ，Zhuzhou 412000，Hunan，China
Published: 2026-07-20 doi: 10.11868/j.issn.1001-4381.2025.000499
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Thin-walled specimens of DD6 single-crystal superalloy with varying thicknesses are fabricated using the Bridgman method. An investigation is carried out to examine the influence of cross-sectional size on the stress-rupture properties of these thin-walled specimens under the conditions of 980 ℃/250 MPa and 1100 ℃/130 MPa. The results reveal that a thin-walled phenomenon occurs in specimens with a thickness less than 1.0 mm at 980 ℃/250 MPa and less than 1.5 mm at 1100 ℃/130 MPa. This thin-walled becomes more pronounced at elevated temperatures. The reduction in the effective loading area， which is attributed to oxidation and internal nitridation， serves as the primary factor contributing to the decline in the stress-rupture properties of thin-walled specimens. Based on the relationship between creep properties and microstructure， a concept of the thin-wall effect coefficient for single-crystal superalloys has been proposed. By utilizing specific surface area as a crucial intermediate variable， this method facilitates the extrapolation of the creep life for thin-walled components.

cross-sectional  /  single crystal superalloy  /  thin-wall effect  /  stress rupture property
杨亮, 李克, 俞泽丰, 谭诗薪, 黄晓鸣, 李嘉荣, 刘世忠, 韩梅. 一种单晶高温合金精铸薄壁试样持久性能的薄壁效应. 材料工程, 2026 , 54 (7) : 192 -200 . DOI: 10.11868/j.issn.1001-4381.2025.000499
Liang YANG, Ke LI, Zefeng YU, Shixin TAN, Xiaoming HUANG, Jiarong LI, Shizhong LIU, Mei HAN. Thin-wall effects on stress rupture property of single crystal superalloy investment cast specimen[J]. Journal of Materials Engineering, 2026 , 54 (7) : 192 -200 . DOI: 10.11868/j.issn.1001-4381.2025.000499
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Year 2026 volume 54 Issue 7
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Article Info
doi: 10.11868/j.issn.1001-4381.2025.000499
  • Receive Date：2025-02-27
  • Online Date：2026-10-28
  • Published：2026-07-20
Article Data
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History
  • Received：2025-02-27
  • Accepted：2025-04-26
Affiliations
    1.AECC Science and Technology on Advanced High Temperature Structural Materials Laboratory，Beijing Institute of Aeronautical Materials，Beijing 100095，China
    2.AECC South Industry Co. ，Ltd. ，Zhuzhou 412000，Hunan，China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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