Influence of Additions Sb on Mechanical Properties and Deformation Features of AZ31-Mg Alloy

2006 ◽  
Vol 15-17 ◽  
pp. 497-500
Author(s):  
Ling Wang ◽  
Su Gui Tian ◽  
Keun Yong Sohn ◽  
Kyung Hyun Kim
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Room Temperature ◽  
Az31 Alloy ◽  
Deformation Mechanisms ◽  
Az31 Mg Alloy ◽  
Deformation Features ◽  
Contrast Analysis ◽  
Observation Results

The mechanical properties and deformation features of AZ31-x%Sb alloys have been studied by means of the measurement of the ultimate tensile properties (UTS) and TEM observation. Results show that the UTS of AZ31 alloy is effectively enhanced to 297 MPa from 222 MPa, by additions of 0.84% Sb element, at room temperature, and the ultimate tensile strength of the alloy is still maintained up to 189MPa as temperature elevated to 200°C. Contrast analysis shows that the deformation mechanisms of AZ31-0.84%Sb alloy are twins and dislocations activated on basal and non-basal planes. The alloy displays the different deformation features at different deformation conditions.

Improved Mechanical Properties of AZ31 Alloy Fabricated by Multi-Directional Forging

2017 ◽  
Vol 727 ◽  
pp. 124-131
Author(s):  
Cai Chen ◽  
Rui Wang ◽  
Xing Hao Du ◽  
Bao Lin Wu
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Yield Strength ◽  
Room Temperature ◽  
Tensile Deformation ◽  
Az31 Alloy ◽  
Refined Grains ◽  
Az31 Mg Alloy ◽  
Cast Microstructure

In this work, the tensile properties of AZ31 Mg alloy deformed by multi-directional forging (MDF) were investigated at room temperature. And the enhanced mechanical properties of yield strength of 93 MPa, ultimate tensile strength (UTS) of 253 MPa and elongation of 29% were achieved. It is discovered that the MDF deformation makes the crystallographic orientation of original as-cast microstructure randomization, providing the condition for the following twinning during tensile deformation. In addition, the original fine grains and continuously refined grains can enhance the strength by restricting the growth of grains and motion of dislocations.

scholarly journals Effects of Substitution of Y with Yb and Ce on the Microstructures and Mechanical Properties of Mg88.5Zn5Y6.5

Metals ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 31
Author(s):  
Hongxin Liao ◽  
Taekyung Lee ◽  
Jiangfeng Song ◽  
Jonghyun Kim ◽  
Fusheng Pan
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Yield Strength ◽  
Creep Resistance ◽  
Room Temperature ◽  
High Thermal Stability ◽  
Long Period ◽  
Microstructures And Mechanical Properties

The microstructures and mechanical properties of the Mg88.5Zn5Y6.5-XREX (RE = Yb and Ce, X = 0, 1.5, 3.0, and 4.5) (wt.%) alloys were investigated in the present study. Mg88.5Zn5Y6.5 is composed of three phases, namely, α-Mg, long-period stacking ordered (LPSO) phases, and intermetallic compounds. The content of the LPSO phases decreased with the addition of Ce and Yb, and no LPSO phases were detected in Mg88.5Zn5Y2.0Yb4.5. The alloys containing the LPSO phases possessed a stratified microstructure and exhibited excellent mechanical properties. Mg88.5Zn5Y5.0Ce1.5 exhibited the highest creep resistance and mechanical strength at both room temperature and 200 °C, owing to its suitable microstructure and high thermal stability. The yield strength of Mg88.5Zn5Y5.0Ce1.5 at room temperature was 358 MPa. The ultimate tensile strength of Mg88.5Zn5Y5.0Ce1.5 at room temperature and 200 °C was 453 MPa and 360 MPa, respectively.

Strength of Commercial Aluminum Alloys after Equal Channel Angular Pressing and Post-ECAP Processing

2006 ◽  
Vol 114 ◽  
pp. 91-96 ◽  
Author(s):  
Maxim Yu. Murashkin ◽  
M.V. Markushev ◽  
Julia Ivanisenko ◽  
Ruslan Valiev
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Tensile Strength ◽  
Aluminum Alloys ◽  
Ultimate Tensile Strength ◽  
Equal Channel Angular Pressing ◽  
Room Temperature ◽  
Solution Treatment ◽  
Ecap Processing ◽  
Angular Pressing

The effects of equal channel angular pressing (ECAP), further heat treatment and rolling on the structure and room temperature mechanical properties of the commercial aluminum alloys 6061 (Al-0.9Mg-0.7Si) and 1560 (Al-6.5Mg-0.6Mn) were investigated. It has been shown that the strength of the alloys after ECAP is higher than that achieved after conventional processing. Prior ECAP solution treatment and post-ECAP ageing can additionally increase the strength of the 6061 alloy. Under optimal ageing conditions a yield strength (YS) of 434 MPa and am ultimate tensile strength (UTS) of 470 MPa were obtained for the alloy. Additional cold rolling leads to a YS and UTS of 475 and 500 MPa with 8% elongation. It was found that the post-ECAP isothermal rolling of the 1560 alloy resulted in the formation of a nano-fibred structure and a tensile strength (YS = 540 MPa and UTS = 635 MPa) that has never previously been observed in commercial non-heat treatable alloys.

Effect of Mo and Bi on Mechanical Properties of Zr-Fe-Cr Alloy at Room Temperature

2013 ◽  
Author(s):  
B. F. Luan ◽  
L. Q. Yang ◽  
T. G. Wei ◽  
K. L. Murty ◽  
C. S. Long ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Electron Microscope ◽  
Ultimate Tensile Strength ◽  
Yield Strength ◽  
Room Temperature ◽  
Mechanical Performance ◽  
Microstructure Observation ◽  
Scanning Electron ◽  
Zr Alloy

To investigate the effects of Mo and Bi on mechanical properties of a Zr-Fe-Cr alloy at room temperature, seven Zr-Fe-Cr-Mo-Bi alloys with different compositions were designed. They were subjected to a series of rolling processes and heat treatments, and then sampled to measure mechanical properties by hardness and tensile test and to characterize microstructures by scanning electron microscope (SEM) and electron channel contrast (ECC) technique. Results indicated that among them two types of Zr-Fe-Cr-Mo-Bi alloys achieve the designed goals on mechanical properties and have the following advantages: (i) the hardness of the alloys, up to 334HV after annealing, is 40% higher than traditional Zr-4. (ii) The yield strength (YS) and ultimate tensile strength (UTS) of the alloys are 526 MP a and 889 MP a after hot rolling and annealing, markedly higher than the traditional Zr alloy. (iii) Good plasticity of the new Zr-Fe-Cr-Mo-Bi alloy is obtained with about 40% elongation, which is greatly higher than the Zr-Fe-Cr-Mo alloy thanks to the addition of Bi offsetting the disadvantage of addition Mo. Furthermore, according to observations of the microstructure observation, the reasons of the effect of the Mo and Bi elements on the mechanical performance of Zr-Fe-Cr alloy were studied and discussed.

Effect of the electropulsing on mechanical properties and microstructure of an ECAPed AZ31 Mg alloy

2008 ◽  
Vol 23 (6) ◽  
pp. 1570-1577 ◽  
Author(s):  
X.N. Du ◽  
S.M. Yin ◽  
S.C. Liu ◽  
B.Q. Wang ◽  
J.D. Guo
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Az31 Alloy ◽  
Mg Alloy ◽  
Microstructure Development ◽  
Grain Sizes ◽  
Angular Pressing ◽  
Az31 Mg Alloy ◽  
Structures And Properties ◽  
Elongation To Failure

The mechanical properties and corresponding microstructure development of the AZ31 Mg alloy after treatment with equal channel angular pressing (ECAP) and subsequent electropulsing (ECP) was investigated. Comparing the ECAP+ECP-treated AZ31 alloy with the ECAP-treated alloy, the elongation to failure was improved significantly, while the yield stress and the ultimate tensile strength were not decreased, the grain sizes were slightly increased and more homogeneous, and the texture was barely changed. The main mechanism for the evolution of the structures and properties might be ascribed to the increased nucleation rate on recrystallization and the decreased dislocation density during the ECP treatment. It was reasonable to expect that the ECAP+ECP treatment would provide a promising approach for enhancing the mechanical properties of the Mg alloys.

Influence of Rolling Temperature on Microstructure and Tensile Properties of AZ31 Sheets

2007 ◽  
Vol 546-549 ◽  
pp. 311-314 ◽  
Author(s):  
Da Quan Li ◽  
Qu Dong Wang ◽  
Wen Jiang Ding
Keyword(s):  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Tensile Properties ◽  
Room Temperature ◽  
Microstructural Analysis ◽  
Rolling Texture ◽  
Az31 Alloy ◽  
Rolling Temperature ◽  
The Poor ◽  
Different Temperatures

Microstructure and tensile properties of AZ31 rolled at different temperatures were characterized. Rolling of extruded AZ31 plates was carried out at room temperature, 573K, 623K and 673K. Cold rolling of extruded AZ31 plates was difficult due to the poor formability at room temperature. And deformation twinning plays an important role in rolling of AZ31 alloy at room temperature. The microstructural analysis showed that the nucleation of dynamic recrystallization (DRX) occurred at 573K, DRX was almost completed at 623K and grain growth was determined at 673K. The ultimate tensile strength (UTS) as large as 377MPa was achieved after rolled at 573K. And the anisotropy in strength was obviously examined due to the rolling texture. The anisotropy reduced as rolling temperature increasing from 573K to 673K and this may be attributed to the completion of DRX.

Effect of Zn/Er Ratio on Microstructures and Mechanical Properties of the Cast Mg-Zn-Er Alloys

2011 ◽  
Vol 686 ◽  
pp. 96-100
Author(s):  
Shu Bo Li ◽  
Han Li ◽  
Jian Hui Li ◽  
Wen Bo Du ◽  
Zhao Hui Wang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Magnesium Alloys ◽  
Room Temperature ◽  
Secondary Phase ◽  
Alloying Elements ◽  
Quasicrystalline Phase ◽  
Microstructure And Mechanical Properties ◽  
Microstructures And Mechanical Properties

The microstructures and mechanical properties of the Mg-Zn-Er alloys have been investigated. The results show that the alloying elements (Zn/Er) with different ratio have a great effect on the microstructure and mechanical properties of the magnesium alloys, especially for the phase constitutes. Furthermore, the more attractive result is that the quasicrystalline phase, as the main secondary phase, precipitates during solidification in the alloy with addition of Zn/Er ration of 6. The cast Mg-5Zn-0.83Er alloy exhibits the ultimate tensile strength and yield tensile strength are 190MPa and 80MPa at room temperature, respectively, with an elongation of 15%.

Effects of Solution and Cryogenic Treatments on Microstructures and Mechanical Properties of AZ31 Alloy Tubes

2013 ◽  
Vol 750-752 ◽  
pp. 760-764 ◽  
Author(s):  
Bao Yi Yu ◽  
Qian Qian Luo ◽  
Yang Li ◽  
Yu Juan Wu ◽  
Run Xia Li
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Tensile Strength ◽  
Room Temperature ◽  
Cryogenic Treatment ◽  
Solution Treatment ◽  
Plastic Property ◽  
Az31 Alloy ◽  
Rolling Process ◽  
Average Grain Size

In order to improve plastic property of AZ31 alloy tubes at room temperature and expand application of cold rolling process in magnesium (Mg) alloys, solution treatment (T4) and cryogenic treatment of AZ31 tubes obtained by drawing were investigated in this work. The results indicate that T4 can improve the microstructure of the alloy, refine grains and eliminate twins. The optimized T4 parameter is 300 °C for 8 h, in which the average grain size of 12 μm can be obtained and elongation reaches to Max of 16.1% and tensile strength reaches to 242 MPa. Moreover, tensile strength was decreased to 211 MPa, while, elongation was improved to 25.4% by T4+cryogenic treatment at-196 °C.

Mechanical Properties of Ultrafine-Grained Al Alloy for Engineering Machinery

2012 ◽  
Vol 629 ◽  
pp. 198-202 ◽  
Author(s):  
Ping Yang ◽  
Kai Huai Yang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Equal Channel Angular Pressing ◽  
Room Temperature ◽  
Al Alloy ◽  
Fracture Modes ◽  
Annealed State ◽  
Angular Pressing ◽  
Ultrafine Grained

Three groups of commercial 1050 Al alloy were subjected to equal channel angular pressing (ECAP) at room temperature using route A, route C and route Bc, respectively. Mechanical properties and fracture modes of as-annealed and ECAPed samples were investigated. The microhardness of 1050 Al fabricated by ECAP increases by a factor of about 1.5 compared to the as-annealed state. The ultimate tensile strength (UTS) increases significantly after ECAP, while the elongation decreases. But they are strongly dependence on the number of ECAP passes and the pressing route. The UTS and elongation of the samples processed by route Bc are best, consequently, the static toughness U of the samples is enhanced. Besides, all specimens subjected to ECAP deformation failed in a ductile manner.

Microstructure Evolution and Mechanical Properties of an Al-Si-Cu-Mg-Ni Aluminium Alloy after Thermal Exposure

2013 ◽  
Vol 765 ◽  
pp. 486-490 ◽  
Author(s):  
Feng Xia ◽  
Jian Ping Li ◽  
Yong Chun Guo ◽  
Zhong Yang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Elevated Temperature ◽  
Ultimate Tensile Strength ◽  
Aluminium Alloy ◽  
Exposure Time ◽  
Room Temperature ◽  
Brinell Hardness ◽  
Eutectic Silicon ◽  
Thermal Exposure

The microstructures and mechanical properties of an Al-Si-Cu-Mg-Ni aluminium alloy have been investigated after thermal exposure at 350 °C for time intervals up to 1000 h. Experimental results showed that, with increasing the thermal exposure time, room temperature ultimate tensile strength, elevated temperature ultimate tensile strength, and Brinell hardness firstly decreased remarkably (up to 100 h) and then decreased slightly to a certain constant value (100-1000 h). Before thermal exposure, room temperature ultimate tensile strength, elevated temperature ultimate tensile strength, elevated temperature elongation percentage, and Brinell hardness of the alloys are 203.5 MPa, 48.7 MPa, 9.2%, and 82.3, respectively. With increasing the thermal exposure time, eutectic silicon grows up steadily, and the amount of Q phase with a flower shape increases. Transmission electron microscopy analysis showed that the formation of stable θ precipitates was found in the microstructure.

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