Journal
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE
Volume 229, Issue 2, Pages 187-204Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/0954405414527268
Keywords
7055 Aluminum alloy; surface roughness; surface topography; surface residual stresses; surface micro-hardness; metamorphic layer
Funding
- National Natural Science Foundation of China [51005184, 51375393]
- Aeronautical Science Foundation of China [2013ZE53060]
- Northwestern Polytechnical University [Z2013048]
Ask authors/readers for more resources
Orthogonal experiments were conducted to investigate the effects of parameters on surface integrity in milling 7055 aluminum alloy. In order to correlate metamorphic layer with thermal and mechanical phenomena developed during milling, milling force and temperature fields of machined surface were obtained with finite element method, while milling speed and feed per tooth were paid particular attention to study formation of metamorphic layer. Experiment results show that when milling speed, feed per tooth, milling depth, and milling width are 1100 m/min, 0.02 mm/z, 0.7 mm, and 6 mm, respectively, obtained surface roughness, surface residual stress in X direction, surface residual stress in Y direction, and surface micro-hardness are Ra 0.258 mu m, -123 MPa, -137 MPa, and 193.76 HV0.025, respectively. From precision machining to rough machining, depth of compressive residual stress layer increases from 35 to 45 mu m, and the depth of plastic deformation layer increases from 5 to 20 mu m. Finally, the formation of metamorphic layer can be explained by thermo-mechanical coupling effects.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available