ChemInform Abstract: ROOM TEMPERATURE PROPERTIES OF AN ALUMINUM ALLOY WITH A MICRODUPLEX STRUCTURE. PART II. TENSILE PROPERTIES AND THEIR DEPENDENCE ON GRAIN SIZE

1981 ◽  
Vol 12 (19) ◽  
Author(s):  
J.-C. JAQUET ◽  
H. WARLIMONT
Keyword(s):  
Grain Size ◽  
Aluminum Alloy ◽  
Tensile Properties ◽  
Room Temperature ◽  
Microduplex Structure

Effect of Silicon on the Microstructure, Tensile Properties and Hot Tearing Susceptibility of AZ91E Alloy

2012 ◽  
Vol 706-709 ◽  
pp. 3046-3051
Author(s):  
Comondore Ravindran ◽  
Sophie Lun Sin
Keyword(s):  
Grain Size ◽  
Tensile Strength ◽  
Tensile Properties ◽  
Room Temperature ◽  
Hot Tearing ◽  
Chinese Script ◽  
Az91 Alloy ◽  
Solidification Behavior ◽  
Last Stage ◽  
Hot Tearing Susceptibility

This Research Focused on Studying the Effect of Silicon on the Hot Tearing Susceptibility of Permanent Mould Cast AZ91E Magnesium Alloy. Varying Amounts of Silicon (0.5, 1.0 and 1.5 Wt.%) Were Added to AZ91E in the Form of an Al-53 Wt.% Si Master Alloy. the Microstructure, Grain Size and Solidification Behavior of each Alloy Were Characterized and Related to their Tensile Properties and Hot Tearing Susceptibility. the Results Showed that the Tensile Strength and the Elongation of AZ91 Alloy Decreased with the Addition of Silicon at Room Temperature, due to the Formation of Chinese Script Mg2si Particles. however, Silicon Significantly Reduced the Hot Tearing Susceptibility of AZ91E. this Was Attributed to the Reduction of the Grain Size and the Decreased Freezing Range of AZ91E, which Contributed to Improve the Interdendritic Feeding during the Last Stage of Solidification.

Influence of Isothermal Forging Temperature on Microstructure and Tensile Properties of Ti-5.8Al-4.0Sn-4.0Zr-0.7Nb-0.4Si-1.5Ta Near-α Titanium Alloy

2010 ◽  
Vol 97-101 ◽  
pp. 153-157
Author(s):  
Tao Wang ◽  
Hong Zhen Guo ◽  
Jian Hua Zhang ◽  
Ze Kun Yao
Keyword(s):  
Grain Size ◽  
Tensile Strength ◽  
Titanium Alloy ◽  
Tensile Properties ◽  
Room Temperature ◽  
Volume Fraction ◽  
Constant Strain Rate ◽  
Isothermal Forging ◽  
Α Phase ◽  
Transus Temperature

The microstructures and room temperature and 600°C tensile properties of Ti-5.8Al-4.0Sn-4.0Zr-0.7Nb -0.4Si-1.5Ta alloy after isothermal forging have been studied. The forging temperature range was from 850°C to 1075°C, and the constant strain rate of 8×10-3/S-1 was adopted. With the increase of forging temperature, the volume fraction of primary α phase decreased and the lamellar α phase became thicker when the temperatures were in range of 850°C -1040°C; The grain size became uneven and the α phase had different forms when the forging temperature was 1040°C and 1075°C respectively; The tensile strength was not sensitive to the temperature and the most difference was within 20MPa. Tensile strength and yield strength attained to the maximum when temperature was 1020°C; the ductility decreased with the increase of forging temperature, and this trend became more obvious if forging temperature was above the β-transus temperature.

In Situ Fabrication and Properties of (Al3Ti)P/6351 Composites

2010 ◽  
Vol 152-153 ◽  
pp. 1437-1440
Author(s):  
Gui Rong Li ◽  
Yu Tao Zhao ◽  
Hong Ming Wang ◽  
Gang Chen
Keyword(s):  
Grain Size ◽  
Aluminum Alloy ◽  
Room Temperature ◽  
Volume Fraction ◽  
In Situ Reaction ◽  
Conventional Process ◽  
Wrought Aluminum

(Al3Ti)p/6351 composites were in situ synthesized via direct melt reaction between 6351 wrought aluminum alloy and K2TiF6 at 720°C. OM, SEM and EDS are utilized to analyze the microstructure and components of composites. The fusing agents of CaF2 and LiCl are mixed with K2TiF6 to lower the temperature of initial in situ reaction. The volume fraction of Al3Ti is 3%.The size of Al3Ti is in the range of 2~4μm, which is much lowered than that fabricated by conventional process. Due to the calcium element from CaF2 the size of Mg2Si phases are decreased to 1~2μm.The microns of independent silicon phases are also observed in the squeezed section. The grain size of α-Al is fined to 30~40μm, which is due to the disperse effect of Al3Ti. The tensile, yield properties and elongation are at room temperature are 365MPa, 320MPa and 10.2%.

Effects of Residual Stresses and the Post Weld Heat Treatments of TIG Welded Aluminum Alloy AA6061-T651

2012 ◽  
Author(s):  
Mohammad W. Dewan ◽  
Jiandong Liang ◽  
M. A. Wahab ◽  
Ayman M. Okeil
Keyword(s):  
Grain Size ◽  
Aluminum Alloy ◽  
Residual Stresses ◽  
Tensile Properties ◽  
Ultrasonic Testing ◽  
Micro Hardness ◽  
Weld Defects ◽  
Performance Reduction ◽  
Weld Heat

Heat treatable AA-6061 T651 Aluminum alloys (Al-Mg-Si) have found considerable importance in various structural applications for their high strength to weight ratio and corrosion resistance properties. Weld defects, residual stresses, and microstructural changes are the key factors for the performance reduction as well as failure of welded structures. Tungsten inert gas (TIG/GTAW) welding was carried out on AA-6061 T651 Aluminum Alloy plates using Argon/Helium (50/50) as the shielding gas. Non-destructive phased array ultrasonic testing (PAUT) was applied for the detection and characterization of weld defects and characterization of the mechanical performances. In this study, ultrasonic technique was also used for the evaluation of post-weld residual stresses in welded components. The approach is based on the acoustoelastic effect, in which ultrasonic wave propagation speed is related to the magnitude of stresses present in the materials. To verify the estimated residual stresses by ultrasonic testing, hole-drilling technique was carried out and observed analogous results. The effects of post weld heat treatment (PWHT) on the residual stresses, grain size, micro hardness, and tensile properties were also studied. The grain size and micro hardness were studied through Heyn’s method and Vickers hardness test, respectively. Lower residual stresses were observed in post-weld heat-treated specimens, which also experienced from microstructure and micro hardness studies. The PWHT also resulted enhanced tensile properties for the redistribution of microstructures and residual stresses.

ALUMINUM ALLOY 771.0

Alloy Digest ◽  
1995 ◽  
Vol 44 (8) ◽  
Keyword(s):  
Aluminum Alloy ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Room Temperature ◽  
Heat Treating ◽  
Permanent Mold ◽  
Permanent Mold Cast

Abstract ALUMINUM ALLOY 771.0 can be sand or permanent mold cast and naturally aged at room temperature. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on casting, heat treating, machining, joining, and surface treatment. Filing Code: AL-338. Producer or source: Various aluminum companies.

scholarly journals Effects of grain size and dendrite arm spacing on tensile properties of continuous-cast 6061 aluminum alloy billets.

1997 ◽  
Vol 47 (2) ◽  
pp. 98-103 ◽  
Author(s):  
Tomokazu YAMASHITA ◽  
Tooru WATANABE ◽  
Kou NAKAHIRA ◽  
Kenji MATSUDA ◽  
Hiroshi ANADA ◽  
...  
Keyword(s):  
Grain Size ◽  
Aluminum Alloy ◽  
Tensile Properties ◽  
Continuous Cast ◽  
6061 Aluminum Alloy ◽  
Dendrite Arm Spacing

The Effect of Mixed RE Elements on Microstructure and Mechanical Properties of Die-Cast AZ91D Alloy

2014 ◽  
Vol 941-944 ◽  
pp. 59-65
Author(s):  
Jia Wei Yuan ◽  
Xing Gang Li ◽  
Kui Zhang ◽  
Yong Jun Li ◽  
Ming Long Ma ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Tensile Properties ◽  
Room Temperature ◽  
Az91d Alloy ◽  
Microstructure And Mechanical Properties ◽  
Die Cast ◽  
Fracture Behaviors ◽  
Re Elements

The effect of mixed RE elements (Y, Nd, Gd ) on the microstructure and tensile properties of die-cast AZ91D alloy were investigated. The results indicated that the content of mixed RE elements lead to the change of the formation of Al▔RE compounds and reduction of the fraction of β-Mg17Al12 phase. The grain size of the alloy added 1.0wt. % RE became smaller than die-cast AZ91D and AZ91D+2.0wt. % RE alloys. The UTS of die-cast AZ91D+xRE(x=0 wt. %, 1.0wt. %, 2.0 wt. %) alloys were 204MPa, 194MPa, 203.6MPa at room temperature, respectively. Moreover, RE addition resulted in fracture behaviors changed.

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