All Outputs (48)

Evaluation of inulin and aloe vera as green corrosion inhibitors for mild steel in 15% HCl (2016)
Conference Proceeding

REACH legislation and PARCOM recommendations are driving research in environmental friendly alternatives to the highly toxic compounds currently used as corrosion inhibitors. Here two candidate plant extract green corrosion inhibitors are evaluated b... Read More about Evaluation of inulin and aloe vera as green corrosion inhibitors for mild steel in 15% HCl.

Gas and liquid-fuelled HVOF spraying of Ni50Cr coating: microstructure and high temperature oxidation (2016)
Journal Article

Ni50Cr thermally sprayed coatings are widely used for high temperature oxidation and corrosion in thermal power plants. In this study, a commercially available gas atomised Ni50Cr powder was sprayed onto a power plant alloy (ASME P92) using both gas... Read More about Gas and liquid-fuelled HVOF spraying of Ni50Cr coating: microstructure and high temperature oxidation.

Modelling and experimental study on ?-phase depletion behaviour of HVOF sprayed free-standing CoNiCrAlY coatings during oxidation (2016)
Journal Article

This paper investigates the β-phase depletion behaviour during oxidation of free-standing CoNiCrA1Y (Co-31.7%Ni-20.8%Cr-8.1%A1-0.5%Y, all in wt%) bond coats prepared by high velocity oxy-fuel (HVOF) thermal spraying. The microstructure of the coating... Read More about Modelling and experimental study on ?-phase depletion behaviour of HVOF sprayed free-standing CoNiCrAlY coatings during oxidation.

Effects of pre-cracking on small punch creep testing of a vacuum plasma-sprayed CoNiCrAlY coating (2016)
Journal Article

This paper presents the results of small punch creep testing (SPCT) of a vacuum plasma-sprayed (VPS) CoNiCrAlY coating (Co – 31.7%, Ni – 20.8%, Cr – 8.1%, Al – 0.5%, Y, all in wt%) carried out at 750 grad. C. Coating cross-sections, after initial hea... Read More about Effects of pre-cracking on small punch creep testing of a vacuum plasma-sprayed CoNiCrAlY coating.

Laser cladding of Ni50Cr: A parametric and dilution study (2016)
Conference Proceeding

© 2016 The Authors. The increasing use of biomass as a fuel is leading to higher fireside corrosion of the heat exchangers in boilers due to the high chlorine and alkali metal content in the fuel. Laser cladding of Ni50Cr is a promising technique to... Read More about Laser cladding of Ni50Cr: A parametric and dilution study.

Green corrosion inhibitors: amino acids and plant extracts (2015)
Conference Proceeding

Corrosion inhibitors are chemicals that are used in many industries to control corro-sion. As they are injected into process streams they have to be continually replen-ished in order to maintain protection. Many chemicals used are environmentally un-... Read More about Green corrosion inhibitors: amino acids and plant extracts.

Laser drilling of via micro-holes in single-crystal semiconductor substrates using a 1070nm fibre laser with millisecond pulse widths (2015)
Journal Article

© 2015 SPIE. Micro-machining of semiconductors is relevant to fabrication challenges within the semiconductor industry. For via holes for solar cells, laser drilling potentially avoids deep plasma etching which requires sophisticated equipment and co... Read More about Laser drilling of via micro-holes in single-crystal semiconductor substrates using a 1070nm fibre laser with millisecond pulse widths.

Effect of surface conditions on internal oxidation and nitridation of HVOF MCrAlY coatings (2015)
Journal Article

This study deals with the isothermal oxidation behaviour of high velocity oxy-fuel sprayed MCrAlY coatings. Both free-standing coatings and coatings attached to IN738 and CMSX4 substrates undergo isothermal oxidation at 1100°C for up to 100h. The eff... Read More about Effect of surface conditions on internal oxidation and nitridation of HVOF MCrAlY coatings.

Neutron strain scanning of fibre and diode laser welds in stainless steel and Ti6Al4V (2014)
Journal Article

Fibre lasers provide an unprecedented combination of high beam quality, brightness and low cost. Fibre laser beams can provide an exceptionally high power density beam with a relatively large depth of focus. Compared to more established laser welding... Read More about Neutron strain scanning of fibre and diode laser welds in stainless steel and Ti6Al4V.

Fibre laser piercing of mild steel: the effects of power intensity, gas type and pressure (2014)
Journal Article

Laser piercing is used to generate a starting point for laser cutting. The pierced hole is normally larger than the kerf width, which means that it cannot lie on the cut line. An experimental program investigating the piercing process as a function o... Read More about Fibre laser piercing of mild steel: the effects of power intensity, gas type and pressure.

The application of specific point energy analysis to laser cutting with 1 ?m laser radiation (2014)
Journal Article

Specific point energy (SPE) is a concept that has been successfully used in laser welding where SPE and power density determine penetration depth. This type of analysis allows the welding characteristics of different laser systems to be directly comp... Read More about The application of specific point energy analysis to laser cutting with 1 ?m laser radiation.

Effect of prior laser microstructural refinement on the formation of amorphous layer in an Al86Co7.6Ce6.4 alloy (2014)
Journal Article

Laser surface melting (LSM) pre-treatment was conducted before large area electron beam (LAEB) treatment in an attempt to eliminate the cracking of the amorphous layer. In our previous work, LAEB treatment successfully generated an amorphous layer on... Read More about Effect of prior laser microstructural refinement on the formation of amorphous layer in an Al86Co7.6Ce6.4 alloy.

Effect of Q-switched laser surface texturing of titanium on osteoblast cell response (2014)
Journal Article

Titanium and its alloys are important biomedical materials. It is known that the surface texture of implanted medical devices affects cell response. Control of cell response has the potential to enhance fixation of implants into bone and, in other ap... Read More about Effect of Q-switched laser surface texturing of titanium on osteoblast cell response.

Application of small punch creep testing to a thermally sprayed CoNiCrAlY bond coat (2013)
Journal Article

High velocity oxy-fuel thermal spraying was used to prepare free-standing CoNiCrAlY (Co–31.7% Ni–20.8% Cr–8.1% Al–0.5% Y (wt%)) bond coat alloy samples approximately 0.5 mm thick. Creep tests were conducted at 750 °C on these samples using a small pu... Read More about Application of small punch creep testing to a thermally sprayed CoNiCrAlY bond coat.

Amorphous layer formation in Al86.0Co7.6Ce6.4 glass-forming alloy by large-area electron beam irradiation (2013)
Journal Article

Amorphous Al-Co-Ce alloys are of interest because of their resistance to corrosion, but high cooling rates are generally required to suppress the formation of crystalline phases. In this study, the surface of a bulk crystalline Al-Co-Ce alloy of a gl... Read More about Amorphous layer formation in Al86.0Co7.6Ce6.4 glass-forming alloy by large-area electron beam irradiation.

Corrosion behaviour of crystalline and amorphous forms of the glass forming alloy Fe43Cr16Mo16C15B10 (2012)
Journal Article

The corrosion behaviour of both crystalline and largely amorphous forms of the Fe-based glass forming alloy, Fe43Cr16Mo16C15B10 alloy was investigated. Two different methods were used to induce transformation to the amorphous form of the alloy: laser... Read More about Corrosion behaviour of crystalline and amorphous forms of the glass forming alloy Fe43Cr16Mo16C15B10.

Abrasive wear behaviour of conventional and large-particle tungsten carbide-based cermet coatings as a function of abrasive size and type (2011)
Journal Article

Abrasive wear behaviour of materials can be assessed using a wide variety of testing methods, and the relative performance of materials will tend to depend upon the testing procedure employed. In this work, two cermet type coatings have been examined... Read More about Abrasive wear behaviour of conventional and large-particle tungsten carbide-based cermet coatings as a function of abrasive size and type.

Scanning electrochemical microscopy at thermal sprayed anti-corrosion coatings: effect of thermal spraying on heterogeneous electron transfer kinetics (2011)
Journal Article

The effect of thermal spraying on the electrochemical activity of an anti-corrosion superalloy was studied quantitatively using scanning electrochemical microscopy (SECM). The superalloy used was Inconel 625 (a Ni base superalloy) and thin coatings o... Read More about Scanning electrochemical microscopy at thermal sprayed anti-corrosion coatings: effect of thermal spraying on heterogeneous electron transfer kinetics.

Fibre laser cutting of thin section mild steel: an explanation of the 'striation free' effect (2011)
Journal Article

This paper presents the results of an experimental and theoretical investigation into the phenomenon of 'striation free cutting', which is a feature of fibre laser/oxygen cutting of thin section mild steel. The paper concludes that the creation of ve... Read More about Fibre laser cutting of thin section mild steel: an explanation of the 'striation free' effect.

Heat affected zones and oxidation marks in fiber laser-oxygen cutting of mild steel (2011)
Journal Article

The effect of cutting speed and sheet thickness on surface oxidation and heat affected zones (HAZs) has been investigated for laser-oxygen cutting of mild steel sheet with a fiber laser. Optical and scanning electron micrographs were used to determin... Read More about Heat affected zones and oxidation marks in fiber laser-oxygen cutting of mild steel.