Non-destructive evaluation of alumina scale on heat-resistant steels using cathodoluminescence and X-ray-excited optical luminescence

2019 ◽  
Vol 154 ◽  
pp. 226-230 ◽  
Author(s):  
Susumu Imashuku ◽  
Kazuaki Wagatsuma
Keyword(s):  
Alumina Scale ◽  
X Ray ◽  
Heat Resistant ◽  
Non Destructive Evaluation ◽  
Optical Luminescence ◽  
Heat Resistant Steels ◽  
Non Destructive

scholarly journals Non-destructive Evaluation of Friction Stir Welded Joints by X-ray Radiography and Infrared Thermography

2014 ◽  
Vol 86 ◽  
pp. 469-475 ◽  
Author(s):  
T. Saravanan ◽  
B.B. Lahiri ◽  
K. Arunmuthu ◽  
S. Bagavathiappan ◽  
A.S. Sekhar ◽  
...  
Keyword(s):  
Infrared Thermography ◽  
Welded Joints ◽  
X Ray ◽  
Friction Stir ◽  
Non Destructive Evaluation ◽  
Non Destructive

scholarly journals Steam Oxidation of Austenitic Heat-Resistant Steels TP347H and TP347HFG at 650–800 °C

Materials ◽  
2019 ◽  
Vol 12 (4) ◽  
pp. 577 ◽  
Author(s):  
Zhiyuan Liang ◽  
Qinxin Zhao
Keyword(s):  
Oxide Scale ◽  
Steam Oxidation ◽  
Oxidation Products ◽  
Oxide Scales ◽  
Metallic Ions ◽  
Breakaway Oxidation ◽  
Outward Diffusion ◽  
X Ray ◽  
Heat Resistant ◽  
Heat Resistant Steels

Steam oxidation of austenitic heat-resistant steels TP347H and TP347HFG at 650–800 °C was investigated. Comprehensive micro-characterization technologies containing Scanning Electron Microscope (SEM), Energy Dispersive X-ray Spectroscopy (EDS), X-ray Diffraction (XRD), and X-ray Photoelectron Spectroscopy (XPS) were employed to observe and analyze the oxidation products. Results show that breakaway oxidation behaviors were observed on TP347H at 700 °C and 800 °C. The oxidation kinetics of TP347HFG at 650–800 °C followed a parabolic law. The oxide scales formed on TP347HFG were composed of MnCr2O4 and Cr2O3. A thin and protective Cr-rich oxide scale was replaced by Fe2O3 nodules due to the insufficient outward migration of metallic ions, including Cr and Mn at the subsurface of coarse-grain TP347H. Smaller grain of TP347HFG promoted the formation of the compact Cr-rich oxide scales. At higher temperatures, the incubation period for breakaway oxidation of the Cr-rich oxide scale was much shorter because of quick evaporation of the Cr2O3 oxide scale and the slower outward diffusion of metallic ions via the grain boundaries.

Non-Destructive Evaluation of Strains and Voiding in Passgvated Copper Metallizations

1993 ◽  
Vol 308 ◽  
Author(s):  
Richard P. Vinci ◽  
Thomas N. Marieb ◽  
John C. Bravman
Keyword(s):  
Thermal Cycle ◽  
Strain State ◽  
Hydrostatic Stress ◽  
Strain Analysis ◽  
X Ray ◽  
Non Destructive Evaluation ◽  
State Determination ◽  
Non Destructive ◽  
Voltage Scanning

ABSTRACTStress induced voiding in passivated Cu lines was investigated by x-ray strain analysis and in-situ high voltage scanning electron microscope (HVSEM) techniques. Cu lines on a Ta underlayer and Cu lines on an Al underlayer were patterned by a trilayer liftoff technique and passivated with Si3N4. For direct observation of stress voiding, specimens were heated to 350ºC in the HVSEM and then cooled and held at 150ºC. Identical samples were subjected to the same thermal cycle for strain state determination using x-ray techniques. The hydrostatic stress state at each temperature was calculated from the measured strains. Few initial voids were observed after passivation in either sample. After heating to 350ºC and cooling to the dwell temperature, no new voiding was seen in the Ta/Cu lines. Measured hydrostatic strains were half those measured in the Al/Cu lines. Heavy voiding was observed in the Al/Cu lines after cooling to the dwell temperature.

X-Rays for Fluid Flow Inspection

2004 ◽  
Author(s):  
D. Chambellan ◽  
O. Gal ◽  
S. Legoupil ◽  
A. Vabre
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Specific Gravity ◽  
Void Fraction ◽  
X Rays ◽  
Optical Technique ◽  
X Ray ◽  
Non Destructive Evaluation ◽  
Intensive Use ◽  
Non Destructive

X-rays techniques are widely used in the non-destructive evaluation field for mechanical inspection. However, development of new x-ray detectors and sources over the last decade has let to an intensive use of this technique in other fields. In this paper, we describe the use of X-rays techniques in the field of fluid flow engineering (fluidics and heat transfer). This technique is very attractive since measurements can be performed even if pressure, temperature require the use of opaque walls. In addition the X-ray technique is well suited to multiphase flows where optical technique can not be used if void fraction is larger than few percents. Specific gravity, mass or void fraction are the main accessible parameters.

Quantitative non-destructive evaluation of drilling defects in SiCf/SiC composites using low-energy X-ray imaging technique

2020 ◽  
Vol 116 ◽  
pp. 102364
Author(s):  
Feifei Liu ◽  
Songping Liu ◽  
Qingle Zhang ◽  
Zhiying Li ◽  
Haipeng Qiu
Keyword(s):  
Imaging Technique ◽  
Low Energy ◽  
X Ray ◽  
Non Destructive Evaluation ◽  
X Ray Imaging ◽  
Sic Composites ◽  
Non Destructive
Sign in / Sign up

Export Citation Format

Share Document