Influence of cutting parameters on surface hardness in milling of AL6061T6

Milling is an important industrial common machining operation used to produce complex surfaces. Surface quality in milling operation is influenced by various factors such as cutting speed, cutting feed, depth of cut and chemical composition of the material. Surface quality is defined by roughness, r...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2020-09, Vol.916 (1), p.12118
Main Authors: Tampu, C, Chirita, B, Cristea, I, Zichil, V, Schnakovszky, C, Herghelegiu, E, Carausu, C
Format: Article
Language:English
Subjects:
Aluminum base alloys
Chemical composition
Corrosion fatigue
Corrosion resistance
Crack initiation
Crack propagation
Cutting parameters
Cutting speed
Fatigue failure
Feed rate
Fracture mechanics
Marine environment
Microhardness
Milling (machining)
Residual stress
Surface hardness
Surface properties
Tool wear
Weight reduction
Workpieces
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Summary:Milling is an important industrial common machining operation used to produce complex surfaces. Surface quality in milling operation is influenced by various factors such as cutting speed, cutting feed, depth of cut and chemical composition of the material. Surface quality is defined by roughness, residual stress and microhardness and is important in determining corrosion resistance and in fatigue crack initiation. The aim of the present paper is to analyse the influence of above-mentioned cutting parameters (cutting feed, cutting speed, depth of cut) on surface microhardness. Tests were conducted using a Coro mill 490 with a single insert that was indexed for every experiment, thus eliminating the influence of tool wear. Al 6061-T6, a material widely utilised in aircraft, defence, automobiles, and marine areas due to its good proprieties (good strength and lightweight) was used. Microhardness was measured on workpiece surface but also in the cross section of the workpiece, up to a depth of 1mm, in order to observe material state in subsurface layer. It was observed from the results that an increase of cutting speed have led to an increase of microhardness while a higher value for depth of cut has led to a lower value of microhardness. Feed rate has generated similar results with the depth of cut.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/916/1/012118