Effects of build direction and heat treatment on creep properties of Ni-base superalloy built up by additive manufacturing
详细信息 查看全文
- 作者：Yen-Ling Kuo ; kuo-yen-ling@ed.tmu.ac.jp ; Shota Horikawa ; Koji Kakehi
- 关键词：Superalloy ; Creep ; Intermetallic compounds ; Melting ; Additive manufacturing
- 刊名：Scripta Materialia
- 出版年：2017
- 出版时间：1 March 2017
- 年：2017
- 卷：129
- 期：Complete
- 页码：74-78
- 全文大小：1369 K
- 卷排序：129
文摘
The effects of build direction and heat treatment on the creep properties of Ni-base superalloy fabricated by additive manufacturing were examined at 650 °C. The creep rupture lives and ductilities of materials produced by additive manufacturing were lower than those of conventionally wrought material. The horizontal-direction specimen exhibited inferior creep life and worse ductility than the vertical-direction specimen because of the direction of the interdendritic δ-phase precipitates, which were arrayed perpendicular to the stress axis in the former specimen. The morphology and a row of interdendritic δ-phase with incoherent interfaces were found to affect the materials' creep life and ductility.