Modelling chip formation of alloy 718
Artikel i vetenskaplig tidskrift, 2009

The aim of this article is to investigate the effect of different fracture criteria on the chip formation process. focusing on the formation of segmented chips and what happens around the cutting edge. Furthermore, it is investigated how well the finite element model is able to capture the transition from continuous to segmented chip formation in alloy 718. Machining alloy 718 at lower cutting speeds (below 50 m/min) the chip produced is long and continuous. At higher cutting speeds (above 100 m/min) the chip produced is segmented. The conclusion from this study is that the transition from continuous chip to segmented chip is caused by both thermal softening and material damage. Furthermore it is concluded that a fracture criterion with a hydrostatic dependency shall be used for accurate modelling of chip segmentation. (C) 2008 Elsevier B.V. All rights reserved.

wear

inconel-718

Alloy 718

fem simulation

titanium-alloys

fracture

Chip formation

FEM

Damage models

tool edge

Segmented chips

Författare

J. Lorentzon

Högskolan Väst

N. Jarvstrat

Högskolan Väst

Lennart Josefson

Chalmers, Tillämpad mekanik, Material- och beräkningsmekanik

Journal of Materials Processing Technology

0924-0136 (ISSN)

Vol. 209 10 4645-4653

Ämneskategorier

Maskinteknik

DOI

10.1016/j.jmatprotec.2008.11.029