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Facilities Center
YANG Caifu
Head:
YANG Caifu (plurality)
Assistant Head:
LI Jikang
Group of
metallographic and failure analysis:
LI Wencheng, HU Rui, DU
Min, LIU Linying
Group of
transmission electron microscopy:
WANG Chang,
Li Jingrong, XING Guohua
Group of
mechanics:
WANG Handong, XING Guoguang, HE Donghui
Group of heat
treatment:
ZHANG Caiming, Tong Jinde, ZHAO Quanlin
Group of heat
expansion: LU
Yan, Yang Shengrong
Group of
thermal simulation:
MA Yanwen, DONG Chongning
Group of
fine-microstructure analysis:
MA Xiang, LI Lingxia
The facilities center is open to all employees in Institute
for Structural Materials for scientific researches, exploitation and
production. In the center, there are various advanced equipments
coupled with experienced technician to serve scientists and
engineers, covering all aspects of the metals researches, such as
materials characterization, failure analysis, welding, surface
treatment, evaluation of mechanical properties etc.
Some equipment can be operated by the researchers themselves,
but others, particularly some advanced and large-scale instruments,
are operated by the qualified technician to collaborate with
researchers, which can reduce the risk of facilities being damaged
by mistakes and also guarantee the quality of experimental data by
the professional technician. .
The main facilities in
the center include:
1.
HITACHI Model S-4300 field emission scanning electron microscope
The field emission scanning electron microscope is used in studying
material microstructure, fracture surface morphologies analysis,
failure analysis (including metal and nonmetal material), evaluating
the lifetime of material and stress vessel. Its resolution can be up
to 1.5nm. It is equipped with HITACHI backscatter probe and EDAX
GENESIS6.0 energy dispersive spectrum. The resolving power is
130eV, the range of detectable element is Be-U, which is very useful
for micro-component analysis.
2.
Metallographic automatic sample preparation equipment
American PENIX griding/polishing machine and ISOMET 500 saw machine
were bought in 2004 to prepare high quality metallographic samples
in a efficient way.
3.
Metallographic image analysis system
The metallographic image analysis system includes Leica MEF4M
microscope and SISC IAS8 analysis software. The amplification is in
the range of 25-1880 times. It is used to observe and capture image
and to determine the particle size, inclusion level, volume fraction
of constituent and grain size distribution by analysis software.
4.
Digital metalloscope
Olympus GX51 and Zeiss 40MAT metalloscope with Canada camera lens
and capture software were bought in 2004 for identifying material
microstructure and capture metallography. GX51 has dark field,
polarization and differential interference function.
5. H-800 transmission electron microscope
This is a conventional HITACHI-800 TEM imported from Japan in
1984, for observation and analysis of material microstructure.
6.
MTS880 multifunctional mechanical machine
The mechanical properties, including the fracture toughness, can be
tested on this machine. The maximum work load is 10kN. The operating
mode of fatigue testing machine includes loading, straining and
displacement. Each of them has three wave form, including sine,
triangle and square-wave.
7.
Thermal simulation machine
Gleeble1500 machine is applied to physical simulation of material
processing. The process from continuous casting, hot or warm
rolling, heat treatment, and even welding can be simulated by such a
compact machine. The optimized process parameters can be derived by
such efficient and economic way to give very useful instructions in
the practical production process.
8.
Formast-D automatic phase transformation machine
This machine can measure CCT/TTT curves, critical transformation
points and expansion coefficient to reveal the phase transformation
taking place during the heat treatment of steel and other various
alloys.
9. Various heat treatment stoves
These stoves were designed for various heat treatments, such
as annealing, normalizing, solution, aging, tempering, quenching,
cold treatment. Some of them can work under vacuum and controllable
ambience with an accurate temperature control.
10.
Failure analysis:
Failure analysis can be done in the center and led by Prof. LI
Wencheng. In the past twenty years, the center has carried out more
than 200 failure analysis and metal quality identification. They
includes stress erosion fracture induced by eroding medium of
hydroxid, chloride, sulfide and nitrate, fatigue fracture under the
condition of alternating stress, hydrogen-induced delayed fracture
and high temperature hydrogen erosion, boiler tube crack induced by
creeping at high temperature and stress, saturated water blast
brought by leaking of high pressure vessel, component keyhole
induced by and chloric ion oxygen erosion, component failure brought
by original defects which is formed by metallurgy, heat treatment,
jointing, foundry. The center has accumulated plenty of experience
based on the actual failure analysis cases, which are from
petrifaction industry, power plants. It is well known in the field
of failure analysis field.
In October 1998, Prof. LI was awarded the National Outstanding
Specialist in the field of failure analysis on the third conference
of machine failure analysis and forecasting-defending due to his contribution. |
