Nanomechanical properties of a nickel-base single-crystal superalloy up to 700°C

被引：0
|
作者：
Wei, Bensheng [1 ,2 ]
Zhang, Longfei [1 ,2 ]
Huang, Lan [1 ,2 ]
Zhou, Kechao [1 ,2 ,3 ]
Huang, Zaiwang [1 ,2 ]
机构：
[1] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China
[2] Cent South Univ, Powder Met Res Inst, Changsha 410083, Peoples R China
[3] Cent South Univ, Shenzhen Res Inst, Shenzhen, Peoples R China
来源：
PHILOSOPHICAL MAGAZINE LETTERS | 2022年 / 102卷 / 02期
关键词：
Single-crystal nickel-based superalloy; high-temperature nanoindentation; indentation; hardness; microstructure; HIGH-TEMPERATURE NANOINDENTATION; NI-BASED SUPERALLOYS; MECHANICAL-PROPERTIES; INDENTATION; MODULUS; CREEP; RE;
D O I：
10.1080/09500839.2021.2004326
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A strong temperature-dependent effect in the range from 25 degrees C to 700 degrees C in the nanomechanical behaviour has been found in a single-crystal nickel-base superalloy. The hardness of this alloy gradually increases from 25 degrees C to 400 degrees C and then rapidly decreases, in contrast to the peak tensile yield strength which occurs at around 700 degrees C. The nanomechanical response is strongly dependent on the indentation load over a wide range of temperature, which is rationalised by its unique gamma/gamma' dual-phase microstructure. The experimental measurements show that the hardness is position-sensitive owing to its unique solidified dendrite microstructure when the indentation marks span 640 mu m.
引用
收藏
页码：53 / 59
页数：7
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