scholarly journals Characterization and observation of water-based nanofluids quench medium with carbon particle content variation

2018 ◽  
Author(s):  
S. S. Yahya ◽  
S. Harjanto ◽  
W. N. Putra ◽  
G. Ramahdita ◽  
Kresnodrianto ◽  
...  
Keyword(s):  
Carbon Particle ◽  
Particle Content ◽  
Content Variation ◽  
Water Based ◽  
Quench Medium

scholarly journals Characterization of water based nanofluid for quench medium

2018 ◽  
Vol 348 ◽  
pp. 012009 ◽  
Author(s):  
Kresnodrianto ◽  
S. Harjanto ◽  
W.N. Putra ◽  
G. Ramahdita ◽  
S.S. Yahya ◽  
...  
Keyword(s):  
Water Based ◽  
Quench Medium

Cooling Rate Observation in Quenching Process Using Carbon Nanofluids for S45C Carbon Steel

2020 ◽  
Vol 833 ◽  
pp. 13-17
Author(s):  
R.I. Riza ◽  
Wahyuaji Narottama Putra ◽  
S. Harjanto
Keyword(s):  
Thermal Property ◽  
Cooling Rate ◽  
Carbon Particle ◽  
Weight Percent ◽  
Carbon Steels ◽  
Distilled Water ◽  
Data Logger ◽  
Quenching Process ◽  
Quench Medium ◽  
Steel Properties

Quenching process is the most important step in steel heat treatment as this process will determine the properties of the steel such as strength and hardness. Different cooling rate and thermal conductivity provided by the quench medium affect strongly to the mentioned steel properties. Recently, studies for nanoparticle added in the quench medium are developing rapidly. This nanoparticle added fluid is known as nanofluid and could affect the thermal property of the quench medium which ultimately changes the properties of the steel. The nanoparticle composition in nanofluid will affect its thermal property. In this research, carbon was used as the nanoparticle. The composition variations were 0.1, 0.3, and 0.5 weight percent in 100 ml distilled water. Pure distilled water was also used as a comparison control. Planetary ball-mill were utilized for 15 hours at 500 rpm to produce nanosized carbon particle. Field-Emission Scanning Microscope (FE-SEM) and Energy Dispersive X-Ray (EDX) were used to check the particle size, shape and purity of the carbon nanoparticles. These nanofluids were then used to quench S45C carbon steels samples annealed at 1000°C for 1 hour. Samples were attached with a thermocouple which connected to temperature data logger to observe the cooling rate of the quench medium. The quenched samples were be tested to get the information of hardness and metallography analysis for supporting data.

Examination of moisture content variation within an operational wet deck

TAPPI Journal ◽  
2013 ◽  
Vol 12 (1) ◽  
pp. 45-50 ◽  
Author(s):  
LAURENCE SCHIMLECK ◽  
KIM LOVE-MYERS ◽  
JOE SANDERS ◽  
HEATH RAYBON ◽  
RICHARD DANIELS ◽  
...  
Keyword(s):  
Moisture Content ◽  
Southeastern United States ◽  
Forest Products ◽  
Time Domain Reflectometry ◽  
Water Application ◽  
Wood Moisture ◽  
International Paper ◽  
Content Variation ◽  
Moisture Variation

Many forest products companies in the southeastern United States store large volumes of roundwood under wet storage. Log quality depends on maintaining a high and constant wood moisture content; however, limited knowledge exists regarding moisture variation within individual logs, and within wet decks as a whole, making it impossible to recommend appropriate water application strategies. To better understand moisture variation within a wet deck, time domain reflectometry (TDR) was used to monitor the moisture variation of 30 southern pine logs over an 11-week period for a wet deck at the International Paper McBean woodyard. Three 125 mm long TDR probes were inserted into each log (before the deck was built) at 3, 4.5, and 7.5 m from the butt. The position of each log within the stack was also recorded. Mixed-effects analysis of variance (ANOVA) was used to examine moisture variation over the study period. Moisture content varied within the log, while position within the stack was generally not significant. The performance of the TDR probes was consistent throughout the study, indicating that they would be suitable for long term (e.g., 12 months) monitoring.

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