Effect of Applied Pressure and Heat Treatment Condition on Microstructural Characteristics and Mechanical Properties of the Thixoforged 357 Aluminum Alloy

2004 ◽  
Vol 13 (1) ◽  
pp. 55-59 ◽  
Author(s):  
C.G. Kang ◽  
S.W. Youn ◽  
S.M. Park
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Aluminum Alloy ◽  
Treatment Condition ◽  
Applied Pressure ◽  
Heat Treatment Condition ◽  
Microstructural Characteristics

Influence of Solution Heat Treatment Temperature and Time on the Microstructure and Mechanical Properties of Gas Induced Semi-Solid (GISS) 6061 Aluminum Alloy

2013 ◽  
Vol 313-314 ◽  
pp. 67-71 ◽  
Author(s):  
Nitikarn Pajaroen ◽  
Thawatchai Plookphol ◽  
Jessada Wannasin ◽  
Sirikul Wisutmethangoon
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Aluminum Alloy ◽  
Treatment Condition ◽  
Solution Heat Treatment ◽  
Heat Treatment Condition ◽  
Eutectic Phase ◽  
6061 Aluminum Alloy ◽  
Semi Solid ◽  
Optimum Solution

The influence of solution heat treatment (SHT) temperature and time on the microstructure and mechanical properties of semi-solid 6061 aluminum alloy has been investigated in this study. Microstructure of the as-cast 6061 aluminum alloy mainly consisted of globular α-Al matrix and eutectic phase (α-Al + Mg2Si) at the grain boundary (GB). Iron rich intermetallic phase was also observed at the grain boundary. Eutectic phase started to dissolve after solution heat treatment. The dissolution of eutectic phase increased with increasing solution treatment time, however, the amount of remaining eutectic phase was found to be slightly changed after solution treating longer than 1 h at 550 °C and 2 h at 530 °C. Hardness and tensile results of specimens after artificial aging were utilized to compare and select the optimum solution heat treatment condition cooperating with the microstructural observation. The optimum solution heat treatment condition of the alloy in this study was at 530 °C for 2 h.

Selective laser melting of AlSi10Mg alloy: influence of heat treatment condition on mechanical properties and microstructure

2018 ◽  
Vol 62 (4) ◽  
pp. 885-892 ◽  
Author(s):  
A. Iturrioz ◽  
E. Gil ◽  
M. M. Petite ◽  
F. Garciandia ◽  
A. M. Mancisidor ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Selective Laser Melting ◽  
Treatment Condition ◽  
Heat Treatment Condition ◽  
Laser Melting

THE EXPENDING RETROGRESSION TIME OF HOT-EXTRUDED Sc-CONTAINING Al–Zn–Mg–Cu ALLOY

2010 ◽  
Vol 17 (03) ◽  
pp. 293-298
Author(s):  
SUNG-YONG SHIM ◽  
DAE-HWAN KIM ◽  
YOUNG-ROCK SUNG ◽  
IN-SHUP AHN ◽  
SU-GUN LIM
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Electrical Conductivity ◽  
Treatment Condition ◽  
Heat Treatment Condition ◽  
Corrosion Properties ◽  
Cu Alloy ◽  
Study Results ◽  
Retrogression And Reaging ◽  
Mechanical Properties And Corrosion

In this paper, the retrogression and reaging (RRA) behavior and corrosion properties of Sc -containing Al–Zn–Mg–Cu alloy were observed. The dependence of the mechanical properties and corrosion resistance on the heat treatment condition was measured by hardness, tensile, C-ring and conductivity testing. The retrogression time for recovery of the yield strength of the alloy subjected to T6 treatment was 20 min at 200°C of retrogression temperature, which was longer than that of Al7075 alloy. The results of electrical conductivity and C-ring tests showed that the stress corrosion cracking (SCC) resistance in Sc -containing alloy treated for 20 min at 200°C was improved. These study results demonstrated the ability of the Sc -containing alloy to extend the retrogression time and thereby improve the SCC resistance and mechanical properties.

Process Dependence of Microstructure and Properties of Sintered Aluminum Nitride for Electronic Packaging

1992 ◽  
Vol 264 ◽  
Author(s):  
I. Dutta ◽  
S. Mitra ◽  
J. Cooper
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Aluminum Nitride ◽  
Treatment Condition ◽  
Heat Treatment Condition ◽  
Boundary Phase ◽  
Secondary Phases ◽  
Treatment Conditions ◽  
Sintered Aluminum ◽  
Sintered Product

AbstractThe development of secondary phases due to additions of Y2O3 during sintering of aluminum nitride was studied. Depending on the heat treatment conditions and the amount of Y2O3 added, different proportions of AlYO3, Al5Y3O12 and Al2Y4O9 were found at the grain boundaries. Temperatures ≳1850°C also resulted in loss of Y2O3 and/or Y-aluminate, yielding some γAl2O3. The mechanical properties and the thermal conductivity of the sintered product were observed to be dependent on the grain boundary phase constitution and hence the specific heat treatment condition.

scholarly journals Characterization of the Role of Squeeze Casting on the Microstructure and Mechanical Properties of the T6 Heat Treated 2017A Aluminum Alloy

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
S. Souissi ◽  
N. Souissi ◽  
H. Barhoumi ◽  
M. ben Amar ◽  
C. Bradai ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Aluminum Alloy ◽  
Squeeze Casting ◽  
Applied Pressure ◽  
High Strength ◽  
Casting Process ◽  
Tensile Tests ◽  
Scanning Calorimetry ◽  
Microstructure And Mechanical Properties

In this study, the effects of squeeze casting process and T6 heat treatment on the microstructure and mechanical properties of 2017A aluminum alloy were investigated with scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDS), differential scanning calorimetry (DSC), and microhardness and tensile tests. The results showed that this alloy contained α matrix, θ-Al2Cu, and other phases. Furthermore, the applied pressure and heat treatment refines the microstructure and improve the ultimate tensile strength (UTS) to 296 MPa and the microhardness to 106 HV with the pressure 90 MPa after ageing at 180°C for 6 h. With ageing temperature increasing to 320°C for 6 h, the strength of the alloy declines slightly to 27 MPa. Then, the yield strength drops quickly when temperature reaches over 320°C. The high strength of the alloy in peak-aged condition is caused by a considerable amount of θ′ precipitates. The growth of θ′ precipitates and the generation of θ phase lead to a rapid drop of the strength when temperature is over 180°C.

Effect of Heat Treatment on Properties and Structural Changes of Poly(p-Phenylene Benzobisoxazole) Fiber

2011 ◽  
Vol 391-392 ◽  
pp. 864-867 ◽  
Author(s):  
Bo Song ◽  
Ling Hui Ying ◽  
Xiao Yun Liu ◽  
Qi Xin Zhuang ◽  
Zhe Wen Han
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Treatment Condition ◽  
Structural Changes ◽  
Heat Treatment Condition ◽  
Molecular Chain ◽  
Temperature Level ◽  
Stress Direction ◽  
Pbo Fiber

The changes of structure and mechanical properties of poly(p-phenylene benzobisoxazole) (PBO) fibers with different heat-treatment condition involving temperature, level of tension and duration was investigated. The results revealed that the modulus of fibers was affected greatly by the heat treatment, while the strength of fiber was insensitive to the applied parameter during the heat treatment. It was also found that the heat treatment could promote the ring-close reaction of PBO molecules to completion and impelled the molecular chains to adjust and slide along the stress direction for further orientation, which could make the molecular chain more stretched, regularize the structure of PBO fibers and improve the mechanical properties of PBO fiber.

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