scholarly journals Effectiveness of biodegradable oils as quenching media for commercial aluminium

2020 ◽  
Vol 54 (5) ◽  
pp. 607-612
Author(s):  
A. Surajudeen Adekunle ◽  
A. Akanni Adeleke ◽  
P. Pelumi Ikubanni ◽  
K. Adekunle Adebiyi ◽  
O. Adekunle Adewuyi
Keyword(s):  
Quenching Media ◽  
Biodegradable Oils ◽  
Commercial Aluminium

scholarly journals Mechanical properties and microstructural evaluation of heat-treated aluminum alloy using formulated bio-quenchants

2020 ◽  
Vol 11 (3) ◽  
pp. 243-250
Author(s):  
Adebayo Surajudeen Adekunle ◽  
Adekunle Akanni Adeleke ◽  
Peter Pelumi Ikubanni ◽  
Peter Olorunleke Omoniyi ◽  
Tajudeen Adelani Gbadamosi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Al Alloy ◽  
Jatropha Oil ◽  
Muffle Furnace ◽  
Quenching Media ◽  
Treatment Processes ◽  
Heat Treated ◽  
Biodegradable Oils ◽  
Microstructural Evaluation

AbstractHeat treatment industries require various quenching media to improve the properties of the materials to be quenched. Petroleum based mineral (PBM) oil, a non-biodegradable oil, is popular amongst others quenchants in heat treatment processes. Recently, biodegradable oils mostly in their raw, unblended and unbleached forms have been employed for quenching of various engineering materials. Therefore, the present study examined the effects of some selected bio-quenchants in blended raw (BR) and blended bleached (BB) forms on the mechanical properties and microstructure of solution heat treated aluminum (Al)-alloy. Edible vegetable oil (70% by volume) was blended with 30% by volume of jatropha oil to form the bio-quenchant oils. Another set of bio-quenchants were formed by bleaching the raw oils before mixing so as to reduce the oxidation level and contaminations in the oil. The Al-alloy is solution heat treated at 500 °C and soaked for 15 min in an electric muffle furnace before quenching in the various established bio-quenchants. Results showed that samples treated in blended raw melon (BRM) oil have higher tensile strength of 151.76 N/mm2 while samples quenched in blended bleached melon (BBM) oil have higher hardness value of 61.00 HRC. In accordance to the results obtained the bio-quenchants were found to be effective replacement to the PBM oil.

“Cavity” formation in superplastically deformed aluminium alloys

1990 ◽  
Vol 48 (4) ◽  
pp. 958-959
Author(s):  
A. Cziráki ◽  
E. Ková-csetényi ◽  
T. Torma ◽  
T. Turmezey
Keyword(s):  
Grain Boundaries ◽  
Aluminium Alloys ◽  
Superplastic Deformation ◽  
Volume Fraction ◽  
Superplastic Forming ◽  
Polished Surface ◽  
Cavity Formation ◽  
Stress Concentrations ◽  
Electron Microscopic ◽  
Commercial Aluminium

It is known that the formation of cavities during superplastic deformation can be correlated with the development of stress concentrations at irregularities along grain boundaries such as particles, ledges and triple points. In commercial aluminium alloys Al-Fe-Si particles or other coarse constituents may play an important role in cavity formation.Cavity formation during superplastic deformation was studied by optical metallography and transmission scanning electron microscopic investigations on Al-Mg-Si and Al-Mg-Mn alloys. The structure of particles was characterized by selected area diffraction and X-ray micro analysis. The volume fraction of “voids” was determined on mechanically polished surface.It was found by electron microscopy that strongly deformed regions are formed during superplastic forming at grain boundaries and around coarse particles.According to electron diffraction measurements these areas consist of small micro crystallized regions. See Fig.l.Comparing the volume fraction and morphology of cavities found by optical microscopy a good correlation was established between that of micro crystalline regions.

New quenching media based on water-soluble polymers

1981 ◽  
Vol 23 (2) ◽  
pp. 104-106 ◽  
Author(s):  
A. V. Tolstousov ◽  
O. A. Bannykh
Keyword(s):  
Water Soluble ◽  
Water Soluble Polymers ◽  
Soluble Polymers ◽  
Quenching Media

scholarly journals Effect of chemical composition and quenching media on recoverable strain in Cu–Zn–Al alloys

2021 ◽  
Vol 12 ◽  
pp. 1368-1379
Author(s):  
Vanja Asanović ◽  
Dragan Radonjić ◽  
Jelena Šćepanović ◽  
Darko Vuksanović
Keyword(s):  
Chemical Composition ◽  
Al Alloys ◽  
Recoverable Strain ◽  
Quenching Media

Study on the Preparation and Amplification Experiment of Al-Pillared Montmorillonite

2011 ◽  
Vol 396-398 ◽  
pp. 1440-1445
Author(s):  
Gang Chen ◽  
Chun Jie Yan ◽  
Jin Feng Shou ◽  
Juan Mei ◽  
Nan Nan Chen
Keyword(s):  
Pilot Scale ◽  
Micropore Volume ◽  
Bet Surface Area ◽  
Scale Production ◽  
Mass Ratio ◽  
Optimum Conditions ◽  
Technical Parameters ◽  
Pillared Montmorillonite ◽  
Commercial Aluminium ◽  
Major Factors

A method of preparation and pilot scale production of Al-pillared montmorillonite has been developed. There is a minimum of time and amount of liquid. And it is simpler to operate than the conventional method of pillaring by using the commercial aluminium hydroxychloride(PAC) powder as the pillaring agent. Here, the effect of the major factors such as the mass ratio of PAC to montmorillonite, the concentration of montmorillonite slurry, the sodium agent pretreatment, washing times and drying temperature on the Al-pillared montmorillonite are studied. Then the optimal technical parameters is determined. XRD, BET surface area and micropore volume are applied in order to study the structure and properties of Al-pillared montmorillonite. As a result, the amplification experiment under the optimum conditions shows that this method offers the potential for extension to an industrial-scale process.

On the possible mechanism(s) of fracture in commercial aluminium

1980 ◽  
Vol 15 (8) ◽  
pp. 2136-2139 ◽  
Author(s):  
A. M. Hammad ◽  
K. A. Padmanabhan ◽  
T. R. Anantharaman
Keyword(s):  
Commercial Aluminium
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