An accurate evaluation of the energy consumption in machining provides useful instruction
for energy saving. In this paper, the material removal energy in ultraprecision machining of …

Although ultra-precision diamond milling has been widely used for free-form machining
surfaces on hard and brittle materials, there has been little research on its semi-ductile …

Through machinable ceramic turning tests, the crack propagation at the machined surface
and subsurface is explored, and the mechanism of unstable propagation is studied. The …

We report on a new, cost-effective, and relatively simple experimental method to evaluate
the Griffith barrier, initiation, and arrest energies in cracked brittle specimens under Mode-I …

Crack propagation and arrest are important phenomena in polycrystalline silicon. This
phenomenon considerably affects the effectiveness of solar cells made up of polycrystalline …

Crystal defects often lead to an intriguing variety of catastrophic failures of materials and
determine the mechanical properties. Here we discover that a dislocation, which was …

Griffith barrier of 2γ s is the accepted fracture energy under vacuum at crack initiation in
brittle materials. It was shown recently, however, that the Griffith barrier is only the lower …

Cutting force and energy are usually used as important criteria for the selection and
optimization of the ultraprecision machining parameters. Effective strategies for minimizing …

The fracture of nanoscale notched brittle materials is investigated using the multi-scale
analysis of cohesive zone modeling and first-principles calculations based on the notched …

The aim of this study is to experimentally seek a unification of brittle fracture by an atomic-
level criterion. In situ fracture experiments are carried out in transmission electron …