Effect of Heat Treatment on Microstructure Homogeneity of Zn-3Mg Alloy

2014 ◽  
Vol 493 ◽  
pp. 777-782
Author(s):  
M.S. Dambatta ◽  
Sudin Izman ◽  
Hendra Hermawan ◽  
Denni Kurniawan
Keyword(s):  
Heat Treatment ◽  
Treatment Process ◽  
Eutectic Mixture ◽  
Casting Process ◽  
Casting Method ◽  
Biodegradable Implant ◽  
Homogenization Treatment ◽  
Material Development ◽  
Uniform Microstructure ◽  
Dendritic Shape

The Zn based alloy has a high potential to be the next generation of biodegradable implant material. Development of this biomaterial involves casting process which often associated with various defects. In this study, Zn-3Mg alloy was prepared using conventional casting method and followed by homogenization treatment (370°C for 10hr) with the aim to improve the microstructure uniformity. Microscopic images show that as-cast Zn-3Mg alloy consists of segregated Zn-rich structure of star-like dendritic shape and eutectic mixture of Mg2Zn11 phase. It is observed that after the heat treatment process thissegregation has been dispersed well and results in a more uniform microstructure of Zn-3Mg alloy with low fraction of casting defects.

Heat Treatment and Analysis of Al- 7005 Alloys Reinforced with Sic Metal Composite

2018 ◽  
Vol 7 (3.34) ◽  
pp. 376
Author(s):  
Arun. A ◽  
Dr V.Sathiyamoorthy ◽  
Amirthalingam. P ◽  
Manikandan A ◽  
Manikandan K ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Silicon Carbide ◽  
Physical Properties ◽  
Aluminium Alloy ◽  
Treatment Process ◽  
Stir Casting ◽  
Metal Composite ◽  
Casting Method ◽  
Mechanical And Physical Properties ◽  
6061 Aluminium Alloy

This paper deals with the 7005 aluminium alloy characterization which has similar physical properties to 6061 aluminium alloy, depending on the temper, may be slightly stronger. To increase their mechanical and physical properties silicon carbide had been introduced in it as reinforcement. Based on mass three different compositional were made and mixed thoroughly, and cast. Stir casting method is used for casting proportioned alloys. Heat treatment process is carried out after casting the alloy is mixed in the three proper compositions. Mechanical properties like hardness, Tensile strength and impact strength were conducted and analyzed. Properties can be altered in a better way using silicon carbide as an reinforcement in aluminium-7005.  

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.

Evolution of the Retrogression and Reaging Treatment on Microstructure and Properties of Aluminum Alloy (Al-Zn-Mg-Cu)

2014 ◽  
Vol 925 ◽  
pp. 258-262 ◽  
Author(s):  
Haider T. Naeem ◽  
Khairul R. Ahmad ◽  
Kahtan S. Mohammad ◽  
Azmi Rahmat
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Treatment Process ◽  
Casting Process ◽  
Direct Chill ◽  
Cu Alloys ◽  
Treatment Conditions ◽  
Retrogression And Reaging ◽  
Aa 7075 ◽  
Dc Casting

In this study the evolution of the retrogression and reaging (RRA) heat treatment process on microstructure and mechanical properties of AA 7075 Al-alloys which produced by semi-direct chill (DC) casting process were investigated. Al-Zn-Mg-Cu alloys were homogenized at different heat treatment conditions, aged at 120°C for 24 h (T6), and retrogressed at 180°C for 30 min then re-aged at 120°C for 24 h (RRA). The results showed that this three-step process of the heat treatments, the mechanical properties of alloys was substantially improved. The highest ultimate tensile strength and Vickers hardness attained for the retrogression and re-aging about 530 MPa and 223 HV respectively. The precipitation strengthening is responsible about improve the strength under impact the retrogression and re-aging process.

The Role of Direct Chilling, Retrogression and Reaging Treatment on Mechanical Properties of High Strength Aluminum Alloy

2013 ◽  
Vol 795 ◽  
pp. 211-218 ◽  
Author(s):  
Haider T. Naeem ◽  
Kahtan S. Mohammed ◽  
R.A. Khairel ◽  
Azmi Rahmat
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
High Strength ◽  
Casting Process ◽  
Al Alloy ◽  
Average Value ◽  
Uniform Microstructure ◽  
Hardness Tests ◽  
Retrogression And Reaging

The effect of retrogression and reaging heat treatment on microstructure evolution andmechanical properties of 7075 Al alloy in direct chilling casting process was investigated. The subsequent heat treatment process comprised pre-aging at 120°C for 24 h, retrogression at 180°C for 30 min, and then reaging at 120°C for 24 h. By this three-step process, the mechanical properties of the chilled casted samples were substantially improved. The samples retain their high strength at T6 level. They gave yield strength up to 290 MPa, ultimate tensile strength of 386 MPa and elongation of 5.9%. The average value of multiple Vickers hardness tests results were in the range of 210 Hv. The direct chilling process followed by retrogression and reaging heat treatment yielded casts of fine and uniform microstructure as opposed to the microstructure of samples casted by the conventional process.

Wear Analysis of LM 25 (A356) Alloy Manufactured by Squeeze Casting

2017 ◽  
Vol 867 ◽  
pp. 157-164
Author(s):  
N. Nagendran ◽  
V.K. Shanmuganathan ◽  
N. Gayathri ◽  
G. Dinesh Ram
Keyword(s):  
Heat Treatment ◽  
Treatment Process ◽  
Squeeze Casting ◽  
A356 Alloy ◽  
Wear Test ◽  
Casting Process ◽  
Wear Behaviour ◽  
Heat Treatment Process ◽  
Wear Analysis ◽  
Before And After

Historically, the series of LM were developed for high strength, corrosion resistance, and good machinability for many applications. LM 25 Al-7Si-0.3Mg-0.5Fe alloy cylindrical shaped castings were manufactured successfully by Squeeze Casting process at high temperature and high pressure. The casting products were made by addition of nanoparticles and without nanoparticles. Heat treatment process was conducted at 490○C and metals was quenched at 30○C (water).Specimens were prepared with and without squeeze and stirrer. Wear test was carried out by, variation in load, and microstructure also studied. The results were compared before and after the heat treatment process for addition of nanoparticle and without nanoparticle. SEM analysis was made on worn surface of the wear specimens for different conditions to study the influence of different casting on the wear behaviour mechanism of the cast alloys. Surface roughness was evaluated before and after the wear analysis for various conditions.

Influence of Heat Treatment Cooling Mediums on the Degradation Property of Biodegradable Zn-3Mg Alloy

2013 ◽  
Vol 845 ◽  
pp. 7-11 ◽  
Author(s):  
M.S. Dambatta ◽  
S. Izman ◽  
Hendra Hermawan ◽  
Denni Kurniawan
Keyword(s):  
Heat Treatment ◽  
Cast Alloy ◽  
Eutectic Mixture ◽  
Optical Microscope ◽  
Water Bath ◽  
X Ray Diffraction ◽  
Casting Method ◽  
Heat Treated ◽  
Biodegradable Metals ◽  
Cooling Media

Recently, Zn-based alloys were introduced as alternative biodegradable metals to the well-studied Mg and Fe based alloys for temporary implants. In this work, Zn-3Mg alloy was developed using a conventional casting method followed by heat treatment with different cooling media. As-cast samples were heat treated at 370 oC for 10 hours then cooled in open air, water bath and inside furnace environments. The microstructure of as-cast alloy was characterized under optical microscope and phase analysis was evaluated using X-ray diffraction (XRD) technique. Potentiodynamic polarization tests were carried out on the heat treated samples for evaluating the degradation rate. It was observed that as-cast Zn-3Mg alloy consists of star-like-shape of primary Zn-rich dendrites which are segregated in the eutectic mixture of Mg2Zn11phase. The segregation of these dendrites has been significantly reduced under water bath cooled treatment as compared to open air and inside furnace cooling. It is also found that the microstructure of the water cooled samples is more homogenous with less porosity than the as-cast, air or furnace cooled samples. The water cooled sample exhibits better degradation resistance for at least 2 folds than other treatments.

Effects of Nano Particles on the Microstructure of LM 25 (A356) Alloy Manufactured by Squeeze Casting

2017 ◽  
Vol 867 ◽  
pp. 64-70
Author(s):  
N. Nagendran ◽  
N. Gayathri ◽  
V.K. Shanmuganathan ◽  
S. Praveen
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Treatment Process ◽  
Squeeze Casting ◽  
Casting Process ◽  
Nano Particles ◽  
Heat Treatment Process ◽  
Cast Part ◽  
Heat Treated ◽  
Squeeze Casting Process

Conventional casting process cannot produce parts as strong as forged parts. Also there are chances of many casting defects such as porosity, hot tears, shrinkage, pin holes, blow holes, mould shift flash, slag, short casting, when casting method is used for fabrication. Thus cast parts only have low mechanical properties. Recent trend is to use Squeeze Casting, which results in superior mechanical and casting properties. This technique is a hybrid metal forming process combining features of both casting and forging in one operation. This process is suitable for low melting alloys like iron and nickel with mechanical properties enhancement. Reduction in micro porosity in cast part and also reduction in machining. Historically, the series of LM were developed for high strength, corrosion resistance, and good machinability for many applications. In this study Squeeze Casting process has been used, since it has porosity free equiaxed grain components of LM 25 composition and cylindrical shaped castings were manufactured successfully by squeeze casting machine at high temperature and high pressure. The first part of the study is about the microstructure of the LM 25 Al-7 Si-0.3 Mg-0.5 Fe alloy. The casting products were made by addition of nano particles and without nano particles. The size of bar casted was by squeeze casting process. It was 260 mm*46mm (7 Pieces). Microstructure of Cast without squeeze and without stirrer, without squeeze and with stirrer, with squeeze and with stirrer Alloys was studied. The second part of the work was the heat treatment process of the finished product. Heat treatment process was conducted at 490○C and for the heat treated metals was quenched at 30○C (water) for the heat treated and unheated metal casting product were taken and microstructure were studied. The results were compared before and after the heat treatment process for addition of nano particles and without nano particles.

Optimization of Heat Treatment Process of ZE41A Magnesium Alloy Using Grey- Based Taguchi Method

2008 ◽  
Vol 3 (2) ◽  
pp. 63-69
Author(s):  
M. Sivapragash ◽  
◽  
V. Sateeshkumar ◽  
P.R. Lakshminarayanan ◽  
R. Karthikeyan ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Magnesium Alloy ◽  
Taguchi Method ◽  
Treatment Process ◽  
Heat Treatment Process

EFFECT ON HARDNESS and MICRO STRUCTURAL BEHAVIOUR OF TOOL STEEL AFTER HEAT TREATMENT PROCESS

2017 ◽  
Vol 4 (24) ◽  
Author(s):  
Karanbir Singh ◽  
Aditya Chhabra ◽  
Vaibhav Kapoor ◽  
Vaibhav Kapoor
Keyword(s):  
Heat Treatment ◽  
Empirical Study ◽  
Tool Steel ◽  
Treatment Process ◽  
Heat Treatment Process ◽  
Structural Behaviour ◽  
Treatment Processes ◽  
En 31

This study is conducted to analyze the effect on the Hardness and Micro Structural Behaviour of three Sample Grades of Tool Steel i.e. EN-31, EN-8, and D3 after Heat Treatment Processes Such As Annealing, Normalizing, and Hardening and Tempering. The purpose of Selecting Tool Steel is Because Tool Steel is Mostly Used in the Manufacturing Industry.This study is based upon the empirical study which means it is derived from experiment and observation rather than theory.

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