Effects of Filtration Purification and Solution Treatment on the Microstructure and Mechanical Property of AZ91D Alloy

2016 ◽  
Vol 849 ◽  
pp. 134-141 ◽  
Author(s):  
Wang Han Bo Liu ◽  
Wen Jun Qi ◽  
Zheng Hua Huang
Keyword(s):  
Mechanical Property ◽  
Impact Toughness ◽  
Elevated Temperatures ◽  
Solution Treatment ◽  
Ceramic Foam ◽  
Az91d Alloy ◽  
Tensile Mechanical Property ◽  
Solution Treated ◽  
Before And After ◽  
Microstructure And Mechanical Property

As-cast and solution-treated microstructures of AZ91D alloy before and after the purification by MgO ceramic foam filter (CFF) with different thicknesses at the range from 15 mm to 35 mm were investigated by optical microscopy and scanning electron microscopy. Meanwhile, the tensile mechanical property and impact toughness were tested. The results show that the impurities in the alloy melt could be eliminated by the filtration purification effectively. With increasing the thickness of CFF, the tensile mechanical property and impact toughness first increased significantly, and then decreased slightly. The AZ91D alloy purified by the CFF with the thickness of 20 mm and the porosity of 10 ppi exhibited the best comprehensive mechanical property. The tensile strength σb, elongation δ and impact toughness αnK at ambient temperature reached 205 MPa, 8.5% and 16 J/cm2, with the improving amplitude of 13%, 31% and 46% comparing with the corresponding unpurified value, respectively. At the same time, σb and δ at elevated temperature reached 195 MPa and 31.5%, with the improving amplitude of 9% and 174%, respectively. After the alloy was solution treated, the mechanical property was enhanced further, and the improving amplitude was larger for the alloy by the filtration purification. σb reached 260 MPa and 205 MPa at ambient and elevated temperatures, with the improving amplitude of 32% and 5% comparing with the unpurified value, respectively. αnK reached 27 J/cm2, with the improving amplitude of 69%.

Microstructure and Mechanical Properties of Mg-RE-B Alloys

2011 ◽  
Vol 311-313 ◽  
pp. 2251-2254
Author(s):  
Le Ping Bu ◽  
Qing Tai Shen ◽  
Pei Wu
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Room Temperature ◽  
Tensile Yield Strength ◽  
Ingot Metallurgy ◽  
Particle Structure ◽  
Promising Candidate ◽  
Excellent Mechanical Property ◽  
Before And After ◽  
Microstructure And Mechanical Property

The best is to read these instructions and follow the outline of this text. Mg-RE-B alloy with minuteness particle structure (MPS) were prepared by ingot metallurgy including as-cast and hot-extruded processing, and the microstructure and mechanical property of Mg-6RE-3B2O3 (wt%) alloys were investigated before and after hot-extruded. The Mg-RE-B alloy has satisfied grain size and particle structure, went with excellent mechanical property of tensile yield strength of 520 MPa and elongation of 5% at room temperature. The MPS Mg-RE-B alloy is a promising candidate among lightweight structural materials

Microstructures and Mechanical Properties of ZK60-XHo Wrought Magnesium Alloys

2013 ◽  
Vol 747-748 ◽  
pp. 359-368 ◽  
Author(s):  
Zheng Hua Huang ◽  
Wen Jun Qi ◽  
Jing Xu
Keyword(s):  
Mechanical Property ◽  
Electron Microscope ◽  
Impact Toughness ◽  
Magnesium Alloys ◽  
Optical Microscope ◽  
Second Phase ◽  
Scanning Calorimetry ◽  
Tensile Mechanical Property ◽  
Fine Grain ◽  
Zk60 Alloy

Microstructures and phase compositions of as-cast and extruded ZK60-xHo (x=0~5) alloys were analyzed by X-ray diffraction, differential scanning calorimetry, optical microscope, scanning electron microscope and transmission electron microscope. Meanwhile, tensile mechanical property and impact toughness were tested. The results showed that as-cast microstructure was refined gradually with increasing the Ho content. Mg-Zn-Ho new phase increased gradually, while MgZn2 phase reduced gradually to disappear. Second phase tended to distribute along grain boundary by continuous network. As-cast tensile mechanical property remained almost unchanged and impact toughness value αnK was low (9~17 J/cm2). After extrusion by λ=40/T=593 K, grain size reached the micron level (1~5 μm) and broken second phase distributed dispersedly. Extruded tensile mechanical property was enhanced obviously. Tensile strength σb at ambient temperature increased gradually from 355 MPa for ZK60 alloy to 375 MPa for ZK60-4.77Ho alloy, while elongation δ decreased gradually from 19.5% to 12.5%. σb at 473 K increased gradually from 120 MPa to 169 MPa. Meanwhile, αnK was enhanced to 26~54 J/cm2. Fine grain and few fine dispersed second phase enhanced the tensile mechanical property and impacted toughness of magnesium alloys effectively.

Study about the Effects of Cryogenic Treatment on the Mechanical Properties of PCrNi3MoVA Steel

2014 ◽  
Vol 541-542 ◽  
pp. 303-306
Author(s):  
Fei Wang ◽  
Yong Cai Chen
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Impact Toughness ◽  
Room Temperature ◽  
Cryogenic Treatment ◽  
Test Results ◽  
Tensile Mechanical Property ◽  
Static Tensile

On the basis of processing the PCrNi3MoVA steel with cryogenic treatment and then experimenting with the static tensile and impulse at room temperature, the effects of cryogenic treatment on macro-mechanical properties of the material is studied. The test results show that tensile mechanical property of PCrNi3MoVA steel can be improved with appropriate number of cryogenic treatment, otherwise can be weakened if the number is inappropriate; at the same time, there is no influence of cryogenic treatment on impact toughness of the material

scholarly journals Effect of Titanium Modification on Microstructure and Impact Toughness of High-Boron Multi-Component Alloy

Metals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 193
Author(s):  
Xiangyi Ren ◽  
Shuli Tang ◽  
Hanguang Fu ◽  
Jiandong Xing
Keyword(s):  
Mechanical Property ◽  
Impact Toughness ◽  
Titanium Addition ◽  
Reticular Structure ◽  
High Boron ◽  
Microstructure And Mechanical Property ◽  
Metallurgical Microstructure

This work investigated the microstructure and mechanical property of high-boron multi-component alloy with Fe, B, C, Cr, Mo, Al, Si, V, Mn and different contents of Ti. The results indicate that the as-cast metallurgical microstructure of high-boron multi-component alloys consist of ferrite, pearlite and borocarbide. In an un-modified alloy, continuous reticular structure of borocarbide is observed. After titanium addition, the structure of borocarbide changes into a fine and isolated morphology. TiC is the existence form of titanium in the alloy, which acts as the heterogeneous nuclei for eutectic borocarbide. Moreover, impact toughness of the alloy is remarkably improved by titanium modification.

Microstructure and Mechanical Properties of AM50+xTi Magnesium Alloys Extruded from As-Cast and Solution Treated Conditions

2005 ◽  
Vol 488-489 ◽  
pp. 629-632 ◽  
Author(s):  
Qu Dong Wang ◽  
Yongjun Chen ◽  
Jianguo Peng ◽  
Man Ping Liu ◽  
Wen Jiang Ding ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Magnesium Alloys ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Solution Treatment ◽  
Solution Treated ◽  
Microstructure And Mechanical Properties ◽  
Mg17al12 Phase ◽  
Ti Addition

Microstructure and mechanical properties of AM50+xTi (x=0,0.01,0.1wt%) magnesium alloys extruded from as-cast and solution treated conditions have been studied. Results show that Ti element obviously refines the microstructure of AM50 magnesium alloy and Mg17Al12 phase. Only 0.01 wt% Ti addition can make the Mg17Al12 phase turn into particles and small rod-like shape. Ti addition improves tensile strength at room temperature, and obviously improves elongation at elevated temperatures up to 200°C. The AM50+xTi alloys extruded from as-cast have better tensile strength at room temperature and better elongation at 100°C, 150°C and 200°C than that of AM50+xTi alloys extruded from solution treatment; The plasticity of AM50 magnesium alloys increases with Ti content increasing and temperature increasing for the tensile fractograph.

Effect of Severe Plastic Deformation on the Structure and Properties of the Age-Hardenable Mg-Sm Alloys

2006 ◽  
Vol 503-504 ◽  
pp. 961-966 ◽  
Author(s):  
L.L. Rokhlin ◽  
Sergey V. Dobatkin ◽  
Tatiana V. Dobatkina ◽  
N.I. Nikitina ◽  
Mikhail V. Popov
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Solution Treatment ◽  
High Strength ◽  
Strengthening Effect ◽  
Subsequent Aging ◽  
Solution Treated ◽  
Solid Solution Decomposition

In this work severe plastic deformation (SPD) was applied to magnesium base alloys of the Mg-Sm system (2.8-5.5 mass %Sm). These alloys are characterized by high strength at elevated temperatures and high strengthening effect during aging. SPD was performed by torsion under pressure of 4 GPa at 20 and 200°C to ε ∼ 6. SPD results in significant strengthening of the Mg-Sm alloys due to the formation of submicrocrystalline structure. In all cases SPD accelerates the solid solution decomposition upon subsequent aging. The highest strengthening can be obtained if the solution treated alloy is aged at 200°C after SPD at room temperature. The state of high strength can be also reached if the following sequence of the operations is used: solution treatment + aging at 200 °C up to maximum hardness + SPD at 20°C + aging at 200°C accompanied by Sm –rich phase precipitation in the submicrocrystalline matrix.

Microstructure and Mechanical Property of MoSi2 Based Composites

2005 ◽  
Vol 475-479 ◽  
pp. 707-710 ◽  
Author(s):  
Sang Ll Lee ◽  
Jin Kyung Lee ◽  
Byeong Hyeon Min ◽  
Yun Seok Shin ◽  
Dong Su Bae ◽  
...  
Keyword(s):  
Mechanical Property ◽  
Flexural Strength ◽  
Interfacial Reaction ◽  
Reaction Layer ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Laminate Composites ◽  
High Toughness ◽  
The Impact ◽  
Microstructure And Mechanical Property

This study dealt with both the strengthening of matrix and the suppression of interfacial reaction for the development of high toughness Nb/MoSi2 laminate composites. The impact values of Nb/MoSi2, Nb/MoSi2-SiC, Nb/MoSi2-ZrO2 laminate composites were investigated at the room temperature. The flexural strength of MoSi2 based composites containing SiC or ZrO2 particles were also evaluated at elevated temperatures. The reduction of reaction layer by the addition of ZrO2 particles led to the sufficient improvement in the impact value of Nb/MoSi2 laminate composites. The flexural strength of MoSi2-SiC and MoSi2-ZrO2 materials decreased at temperatures higher than 800 °C.

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