Broaching Performance of Superalloy GH4169 Based on FEM

• Published in: Journal of materials science & technology Vol. 27; no. 12; pp. 1178 - 1184
• Main Authors: Kong, Xiangwei, Li, Bin, Jin, Zhibo, Geng, Wenran
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.12.2011
• Subjects: Aircraft components; Chip formation; Computer simulation; Finite element method; Finite element method (FEM); High-speed machining; Machining; Mathematical analysis; Mathematical models; Nickel base alloys; Saw-tooth chip; Superalloy; Superalloys; Finite element method (FEM); Superalloy; Machining; Saw-tooth chip
• ISSN: 1005-0302; 1941-1162
• DOI: 10.1016/S1005-0302(12)60015-2

The nickel-based superalloy GH4169 is an important material for high temperature applications in the aerospace industry. However, due to its poor machinability, GH416g is hard to be cut and generates saw-tooth chips during high speed machining, which could significantly affect the dynamic cutting force, cutting temperature fluctuation, tool life, and the surface integrity of the parts. In this paper, the saw-tooth chip formation mechanism of superalloy GH4169 was investigated by the elasto-viscoplastic finite element method （FEM）. Using the finite element software of ABAQUS/Explicit, the deformation of the part during high speed machining was simulated. The effective plastic strain, the temperature field, the stress distribution, and the cutting force were analyzed to determine the influence of the cutting parameters on the saw-tooth chip formation. The study on broaching performance has great effect on selecting suitable machining parameters and improving tool life.