The deformation and fracture modes of fine and coarsened Nb_SS phase in a Nb-20Si-24Ti-2Al-2Cr alloy with a Nb_SS/Nb₅Si₃ microstructure

详细信息    查看全文

• 作者：Teng Fei ; Youxing Yu ; Chungen Zhou ; Jiangbo Sha ; ^{jbsha@sina.com}
• 关键词：Nb-Si alloy ; Intermetallics ; Spark plasma sintering ; Microstructural evolution ; Fracture toughness ; Deformation and fracture modes
• 刊名：Materials & Design
• 出版年：2017
• 出版时间：15 February 2017
• 年：2017
• 卷：116
• 期：Complete
• 页码：92-98
• 全文大小：2151 K
• 卷排序：116

文摘

Nb-Si based alloy powders were prepared by plasma rotating electrode atomization. A fine NbSS/Nb5Si3 microstructure (~ 2 μm) was obtained by spark plasma sintering (SPS). Operation of active 〈1 1 1〉/2 dislocation resulting in a dimple failure of SPS NbSS Immovable 〈1 0 0〉 dislocation developed {0 0 1} cleavage of arc-melting (AM) NbSS. Fracture toughness of the SPS and AM Nb-Si samples was 18.9 and 11.5 MPa·m1/2 respectively.