搜索
Effect of misaligned grain deviation on high-temperature tensile properties of directionally solidified DZ409 superalloy
发布时间：2026-05-18
点击次数：
- 发布时间：
- 2026-05-18
- DOI码：
- 10.1016/j.msea.2026.150438
- 论文名称：
- Effect of misaligned grain deviation on high-temperature tensile properties of directionally solidified DZ409 superalloy
- 发表刊物：
- Materials Science & Engineering A
- 关键字：
- Directionally solidification Misaligned grain defect Columnar-grain Turbine blades High-temperature performance
- 摘要：
- The misaligned grain, macroscopically characterized by a deviation of the grain boundaries from the principal stress direction, is a common defect in directionally solidified (DS) columnar-grained turbine blades. However, the influence of misaligned grain defects on the high-temperature mechanical properties is unclear. This study investigates the high-temperature tensile properties at 650 °C and 950 °C of the DZ409 superalloy to explore the relationship between the grain boundary deviation angle and high-temperature performance. The results indicate that at 650 °C, the yield strength and elongation decrease gradually with increasing deviation angle by approximately variations of 102 MPa and 1.8 %, respectively. In contrast, at 950 °C, the deviation angle has a negligible effect on yield strength with an increase of 29 MPa and elongation with a reduction of 1.1 %. This discrepancy in the influence of deviation angle on tensile properties at different temperatures is attributed to a difference in fracture mechanisms. This study provides a new insight into the impact of misaligned grain defects on high-temperature performance from angle dependence and temperature dependence.
- 第一作者：
- Haiyang Song.
- 论文类型：
- 期刊论文
- 是否译文：
- 否
- 上一条：Design and vat photopolymerization additive manufacturing of 3D-architected SiC-based high-temperature ceramic metamaterials with programmable near-zero thermal expansion
- 下一条：A theoretical model for predicting multi-cracking susceptibility in Ni-based superalloys fabricated by additive manufacturing
