in which,
the thermal fatigue resistance of 3Cr2W8V dies teelwith biomi-
metic surface was investigated.It was found that the units with
different sizeshadvariouseffectsonpreventingthermalfatigue
cracks.Meng et al. [14] studied the improved thermal fatigue
resistance of H13 die steel with various unit morphologies(includ-
ing ‘prolate’, ‘U’ and ‘V’ morphology) beneath the surface;the
optimum thermal fatigue behavior of unit with ‘U’ morphology
was reported.
In fact,biomimetic surface processed by the BCLR process is
characterized by the coupled surface structure which is composed
of structural units and matrix material.These units have different
microstructures or chemical compositions from the matrix mate-
rial. The morphological factors include spacing and distribution
(such asspots,stripesandnetwork)of units.Thus,the chemical
compositions of unit and biomimetic surface morphologies play
pivotal role in affecting properties of materials.For instance,Tong
et al. [15] investigated the thermal fatigue characteristics of gray
cast iron with biomimetic surface treated by laser alloying using Cr
powder.The treated sample had superior resistance to thermal
fatigue, compared with laser melting treateds ample.Zhang et al.
[16]