Paper Title:
The Theoretical Study on the Mechanism of BDT in Machined Si Single Crystal
  Abstract

The mechanism of brittle-ductile transition (BDT) in machined Si single crystal is investigated by simulating dislocations emission from crack tip along (111) and (111) slip plane under mixed-mode loading. One kind of compression-shear crack is taken into account and the law of strain-energy-density-factor is applied as fracture criteria. The total number of the emitted dislocations and the number of dislocations in each slip plane at the onset of cleavage are calculated. It is found that the ratio of stress intensity factor kII to kI that the crack tip is subjected has significant effect on the BDT in machined Si single crystal. Then the results are applied to study the action of negative rake angle and edge radius of diamond tool in the ultra-precision turning.

  Info
Periodical
Edited by
Shen Dong and Yingxue Yao
Pages
84-89
DOI
10.4028/www.scientific.net/KEM.339.84
Citation
M. H. Wang, Z. S. Lu, "The Theoretical Study on the Mechanism of BDT in Machined Si Single Crystal", Key Engineering Materials, Vol. 339, pp. 84-89, 2007
Online since
May 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: A.K. Semennikov, S.Yu. Karpov, M.S. Ramm, A.E. Romanov, Yuri N. Makarov
383
Authors: Xue Song Han
Abstract:Exit fracture, the main factor influencing the precision of workpiece, has already been extensively studied. In the case of nanometric...
1833
Authors: Jun Zhou, Jian Feng Li, Jie Sun
Abstract:In this paper, the micro-scale machining characteristics of a non-ferrous structural alloy, aluminum 7050-T7451 is investigated through a...
657
Authors: Yi Nan Lai, Sheng Le Ren, Zeng Lou Li, Jun Tao Gu, Guang Fei Wu
Abstract:The unloading spring-back of tubes during its manufacturing process shows a strong nonlinearity, which greatly influences the precision of...
202
Authors: Zhi Ping Yin, Jiong Zhang, Jin Guo, Qi Qing Huang
Abstract:The finite element software ANSYS was employed to create a finite element model of the cracked wing beam integrated structure, and the stress...
101