کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
793366 | 902421 | 2009 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Modelling chip formation of alloy 718 Modelling chip formation of alloy 718](/preview/png/793366.png)
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.
Journal: Journal of Materials Processing Technology - Volume 209, Issue 10, 1 June 2009, Pages 4645–4653