Microstructure and mechanical properties of inertia friction welded joints between alloy steel 42CrMo and cast Ni-based superalloy K418

被引：43

作者：

Ding, Yuhan ^{[1
]}

You, Guoqiang ^{[1
,2
]}

Wen, Hengyu ^{[1
]}

Li, Peiqi ^{[1
]}

Tong, Xin ^{[1
]}

Zhou, Yuehong ^{[3
]}

机构：

[1] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400045, Peoples R China

[2] Chongqing Univ, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400044, Peoples R China

[3] Chongqing Turbo Flow Machinery Mfg Co Ltd, Chongqing 401120, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 803卷

关键词：

Inertia friction welding; Dissimilar metals; Microstructure; Interface feature; Mechanical properties; TURBO DISK; EVOLUTION; STRENGTH; BEHAVIOR;

D O I：

10.1016/j.jallcom.2019.06.136

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The alloy steel 42CrMo and the cast Ni-based superalloy K418 were successfully joined by inertia friction welding. The effects of the initial flywheel kinetic energy on the microstructure and mechanical properties of the joints were investigated. The results showed that inertia friction welding is a rapid and efficient way to achieve metallurgical bonding between 42CrMo and K418. Intermetallic compounds Fe0.64Ni0.36, Ni-Fe-Cr, Ni-3 (Al, Ti) and MC-type carbides like NbC and TiC were observed at the interface containing a diffusion layer because of element diffusion. Elemental distribution analysis indicated that Fe and Ni were intermixed at the interface. The maximum tensile strength of the dissimilar 42CrMo/K418 joint was 772.19 MPa. Tensile fracture was identified to have occurred on the K418 side with brittle fracture features at an initial flywheel kinetic energy of 50.6 kJ. The origin and expansion of the cracks were mainly attributed to the MC carbides. (C) 2019 Elsevier B.V. All rights reserved.

引用

页码：176 / 184

页数：9

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