scholarly journals Multistage artificial aging optimization for tensile properties of Duralium using Response Surface Method (RSM)

2018 ◽  
Vol 204 ◽  
pp. 00007 ◽  
Author(s):  
Poppy Puspitasari ◽  
Tsamroh Dewi Izzatus ◽  
Mochamad Achyarsyah ◽  
Beny Bandanajaya ◽  
Dewi puspitasari
Keyword(s):  
Tensile Strength ◽  
Aging Process ◽  
Artificial Aging ◽  
Optimum Parameter ◽  
Treatment Process ◽  
Design Matrix ◽  
Heat Treatment Process ◽  
Significant Parameter ◽  
Surface Method ◽  
Central Composite

This study developing mathematical model to optimize heat treatment process to obtain the most significant parameter that affected tensile strength of duralium through multistage artificial aging. The process parameters in this study were temperature of aging, holding time of aging, and artificial aging process was conducted in double stages. The experiments were conducted according to central composite design matrix. The adequacy of developed model was analysed by analysis of variance (ANOVA). The optimum parameter of multistage artificial aging was obtained for maximum tensile strength of duralium.

Non Treatment, T4 and T6 on Tensile Strength of Al-5.9Cu-1.9Mg Alloy Investigated by Variation of Casting Temperature

2018 ◽  
Vol 929 ◽  
pp. 56-62 ◽  
Author(s):  
Hasan Akhyar ◽  
Priyo Tri Iswanto ◽  
Viktor Malau
Keyword(s):  
Tensile Strength ◽  
Artificial Aging ◽  
Treatment Process ◽  
Natural Aging ◽  
Mold Temperature ◽  
Casting Temperature ◽  
Heat Treatment Process ◽  
Cast Sample ◽  
Heat Treated ◽  
Treated Sample

In this experiment, the influence of non-treated (NT), natural aging (T4) and artificial aging (T6) heat-treatments was investigated on the tensile strength of Al-5.9Cu-1.9Mg at different casting temperatures. Three levels of casting temperatures were used: 688, 738, 788 °C while the mold temperature was kept constant at 220 °C. The cast sample was heat-treated by natural aging and artificial aging techniques. The results show that the tensile strength in the non-treated sample decreases initially and then rises slightly with increasing casting temperature. The effect of casting temperature on T4 involved first an increase in tensile strength and then a decrease when elevating the casting temperature, but with no significant effect. In the T6 treatment, the tensile strength first decreases followed by a slight increase with increasing casting temperature. The heat treatment process improved the tensile strength in the three different samples, except at a casting temperature of 768 °C.

Developing Empirical Relationships to Predict Tensile Properties of Friction Welded AISI 52100 Grade Steel Rods

2014 ◽  
Vol 592-594 ◽  
pp. 144-147 ◽  
Author(s):  
S.T. Selvamani ◽  
K. Umanath ◽  
K. Palanikumar ◽  
K. Vigneswar
Keyword(s):  
Tensile Strength ◽  
Empirical Relationship ◽  
Tensile Tests ◽  
Design Matrix ◽  
Central Composite Rotatable Design ◽  
Empirical Relationships ◽  
Surface Method ◽  
Aisi 52100 ◽  
Central Composite ◽  
Grade Steel

In this work, friction welding of AISI 52100 grade steel rods of 12 mm diameter was investigated to predict the value of tensile strength. The Joints made with various process parameter combinations were subjected to tensile tests. The primary process parameters are considered in ratios (friction pressure/friction time, forging pressure/forging time, rotational speed/sec). This is done to make as three factors. Here, the three factors, five levels, central composite, rotatable design matrix are worn to optimize the required number of experiments. The Empirical relationships were developed by Response Surface Method (RSM). The adequacy of the models was checked through ANOVA technique. Through using the developed Empirical relationship, Ultimate Tensile Strength (UTS) of the joints can be predicted by means of 95% confidence level.

THE NEW HEAT TREATMENT TECHNOLOGY OF A356 ALUMINIUM ALLOY PREPARED BY PTC

2009 ◽  
Vol 23 (06n07) ◽  
pp. 906-913 ◽  
Author(s):  
LIANYONG ZHANG ◽  
YANHUA JIANG ◽  
ZHUANG MA ◽  
WENKUI WANG
Keyword(s):  
Electron Microscopy ◽  
Phase Transition ◽  
Heat Treatment ◽  
Tensile Strength ◽  
Treatment Process ◽  
A356 Alloy ◽  
Heat Treatment Process ◽  
X Rays ◽  
Treatment Technology ◽  
Conventional Heat Treatment

Phase Transition Cooling (PTC), using the absorbed latent heat during the melting of phase transition cooling medium to cool and solidify alloys in the process of casting, is a new casting technology. Specimens of A356 casting aluminum alloy were prepared by this method in the paper. The new heat treatment process (cast and then aging directly without solid solution) of A356 alloy was performed. For comparison, the conventional T6 heat treatment (solution and then aging treatment) was performed too. The mechanical properties of A356 alloy with different heat treatments were measured by tensile strength testing methods and microstructures of the alloy with different heat treatment process were investigated by optical microscopy (OM), scanning electron microscopy (SEM), differential scanning calorimetry (DSC), X-rays diffraction (XRD) and transmission electron microscopy (TEM) too. The results show that ultimate tensile strength (UTS) of A356 alloy with the new heat treatment process is much higher than that with conventional heat treatment while the elongations with the two heat treatment processes are very close. This is due to the grain refinement obtained after PTC processing.

Effects of Heat Treatment on the Mechanical and Tribological Properties of Aluminium (LM6) Reinforced with Iron Oxide (Fe2O3)

2020 ◽  
Vol 12 (3) ◽  
Author(s):  
J. Arun Prakash ◽  
P. Shanmughasundaram ◽  
M. Vemburaj ◽  
P. Gowtham
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Tensile Strength ◽  
Iron Oxide ◽  
Treatment Process ◽  
Casting Process ◽  
Stir Casting ◽  
Heat Treatment Process ◽  
Treatment Results ◽  
Mechanical And Tribological Properties

This work deals with the examination of the mechanical properties of Aluminium (LM6) reinforced with iron oxide (Fe2O3). Stir casting process is used to formulate the composite sampling by varying iron oxide in 5% and 10% by weight. Three different heat treatment process of hardening, annealing and normalizing is carried out on samples of aluminium (LM6), aluminium (LM6) + 5% Fe2O3 and aluminium (LM6) + 10% Fe2O3. Composite specimens are tested to analyze the mechanical properties such as hardness, yield stress, tensile strength and elongation. Present reinforcement specks enabled the alloy to preserve higher hardness during the heat treatment. Results have shown substantial improvements in properties of the specimens with various compositions of reinforcement.

High Tensile Strength of Drawn Gold

2005 ◽  
Vol 495-497 ◽  
pp. 907-912 ◽  
Author(s):  
Suk Hoon Kang ◽  
Hee Suk Jung ◽  
Woong Ho Bang ◽  
Jae Hyung Cho ◽  
Kyu Hwan Oh ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Grain Size ◽  
Tensile Strength ◽  
Treatment Process ◽  
Gold Wire ◽  
Equivalent Strain ◽  
Heat Treatment Process ◽  
High Tensile Strength ◽  
Heat Treated ◽  
Gold Wires

This paper studies the microstructure of drawn gold wires to equivalent strain of 10 and to equivalent strain of 8.5 then heat-treated. The texture of gold wire drawn to strain of 10 is mainly composed of <100> and <111> fibers. Tensile strength of the gold wire increases with <111> fiber fraction, while the grain size does not appear to affect the tensile property. With an exception at heat treatment at 600oC, the texture of gold wire drawn the strain of 8.5 is replaced with <100> fiber component by heat treatment process at 400~700oC. Heat treatment at 600oC produces <110> fiber or <112> fiber, depending upon annealing time.

Effects of Heat Treatment Process on Mechanical Properties of X70 Grade Pipeline Steel Bends

2015 ◽  
Vol 727-728 ◽  
pp. 322-326 ◽  
Author(s):  
Shi Lu Zhao ◽  
Zhen Zhang ◽  
Lian Chong Qu ◽  
Jun Zhang ◽  
Jian Ming Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Tensile Strength ◽  
Yield Strength ◽  
Thermal Insulation ◽  
Treatment Process ◽  
Pipeline Steel ◽  
Impact Testing ◽  
Air Cooling ◽  
Heat Treatment Process

Effects of heat treatment process of quenching and tempering under different temperature conditions on mechanical properties of X70 grade pipeline steel bends were studied. Brinell hardness, yield strength, tensile strength, elongation and impact absorbing energy of the bends were tested by using hardness tester, cupping machine and impact testing machine, respectively. It shows that the best heat treatment process of the X70 grade pipeline steel bends is quenching at 890 °Cand thermal insulation for 26 min then water cooling followed by tempering at 590 °C and thermal insulation for 60 min then air cooling. Furthermore, the resulting hardness, yield strength, tensile strength, yield ratio, elongation and impact absorbing energy reach HB230, 595 MPa, 725 MPa, 0.82, 28% and 300 J respectively, which has excellent comprehensive mechanical properties.

scholarly journals Investigation of the optimal treatment condition for flax rove in supercritical CO2

2018 ◽  
Vol 22 (4) ◽  
pp. 1613-1619
Author(s):  
Juan Zhang ◽  
Jin-Song Wu ◽  
Xian-Dong Jing ◽  
Zhao-Tie Liu ◽  
Lai-Jiu Zheng
Keyword(s):  
Supercritical Co2 ◽  
Treatment Condition ◽  
Treatment Process ◽  
Polynomial Equation ◽  
Green Solvent ◽  
Surface Method ◽  
Final Response ◽  
Temperature And Pressure ◽  
Experimental Values ◽  
Central Composite

Three treatment parameters of supercritical CO2 have been optimized by a response surface method using central composite design to obtain isolate yield of flax rove. Influence of operating parameters including dosage of cellulase, temperature, and pressure on final response is evaluated. The results show that the experimental values are adequately fitted to a quadratic polynomial equation. The optimal isolate yield is obtained with 2% cellulase dosage under temperature of 50?C and pressure of 20 MPa. Mathematical model is also applied to describe the kinetic behavior of the treatment process, revealing that supercritical CO2 is a promising green solvent for the scouring and bleaching of flax rove.

Effect of Heat Treatment Process on Microstructure and Mechanical Properties of SWRS82B Wire Rod

2010 ◽  
Vol 97-101 ◽  
pp. 752-755 ◽  
Author(s):  
Jia Qi Zhang ◽  
Yi Long Liang ◽  
Song Xiang ◽  
Xiao Di Yang ◽  
Ming Yang
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Treatment Process ◽  
Block Size ◽  
Interlamellar Spacing ◽  
Heat Treatment Process ◽  
Austenitizing Temperature ◽  
Isothermal Temperature

The effect of the heat treatment process parameters on the mechanical properties and microstructure of SWRS82B wire rods were investigated. Specimens were austenitized at 850°C~900°C and held at 500°C~600°C. The results show that the interlamellar spacing and the pearlite block size become finer with the decrease of the isothermal temperature. At the same isothermal temperature condition, the interlamellar spacing decreases with the increase of austenitizing temperature. The fine interlamellar spacing increases the yield strength and ultimate tensile strength.

Developing a Mathematical Model to Predict Tensile Properties of Friction Welded AISI 1035 Grade Steel Rods

2014 ◽  
Vol 984-985 ◽  
pp. 608-612
Author(s):  
S.T. Selvamani ◽  
K. Umanath ◽  
K. Palanikumar ◽  
K. Vigneswar
Keyword(s):  
Mathematical Models ◽  
Tensile Properties ◽  
Tensile Tests ◽  
Optical Microscope ◽  
Design Matrix ◽  
Central Composite Rotatable Design ◽  
Surface Method ◽  
Percent Confidence Level ◽  
Central Composite ◽  
Grade Steel

In this work, frictions welding of AISI 1035 grade steel rods of 12 mm diameter were investigated with an aim to predict the value of tensile properties. Welds made with various process parameter combinations were subjected to tensile tests. Here, the three factors, five levels, central composite, rotatable design matrix are worn to limit the number of experiments. The mathematical models were developed by response surface method (RSM). The adequacies of the models were checked through ANOVA technique. From developed mathematical models, ultimate tensile strength (UTS) of the joints can be predicted by means of 95 percent confidence level. The integrity of the joints has been investigated using optical microscope.

scholarly journals PENGARUH TEMPERATUR ANELING TERHADAP KEKERASAN DAN KEKUATAN PIPA TEMBAGA AC BEKAS

INFO-TEKNIK ◽  
2020 ◽  
Vol 20 (2) ◽  
pp. 193
Author(s):  
R. N. Akhsanu Takwim ◽  
Kris Witono ◽  
Pondi Udianto
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Tensile Strength ◽  
Air Conditioning ◽  
Treatment Process ◽  
Heat Treatment Process ◽  
Test Results ◽  
Proportional Limit ◽  
Limit Stress ◽  
Proportional Limit Stress

During the installation process, copper pipes for air conditioning will experience a very large deformation due to straightening and bending following the installation path. Hardening strains occur that result in changes in mechanical properties in this case decreases ductility making it difficult to do the connecting process with flaring. Studies need to be carried out to restore the mechanical properties of copper pipes that have been used, including the heat treatment process on copper pipes, so that used copper pipes have a better benefit value than having to be recycled. The temperature of the heat treatment is varied from 400oC, 500 oC and 600 oC. Tensile test results show that at annealed temperature of 400 oC has the highest tensile strength of 125.81 N / mm2 and proportional limit stress of 40.52 N / mm2. Whereas in the microhardness test, the highest hardness occurs also at annealed temperature of 400 oC which is equal to 50.8 HV.

Sign in / Sign up

Export Citation Format

Share Document