Annealing Process Optimization of a ME Wrought Magnesium Alloy

2007 ◽  
Vol 546-549 ◽  
pp. 351-354
Author(s):  
Ya Zhong Zhao ◽  
Fu Sheng Pan ◽  
Jian Peng ◽  
Jun Zhou
Keyword(s):  
Tensile Strength ◽  
Magnesium Alloy ◽  
Process Optimization ◽  
Annealing Temperature ◽  
Hold Time ◽  
Tensile Specimen ◽  
Annealing Process ◽  
Ductile Rupture ◽  
Wrought Magnesium Alloy

The properties and microstructures after different annealing processes of an as-extruded ME magnesium alloy were investigated. The results showed the better properties with the tensile strength of 205 MPa and the elongation of 19.8%, respectively, could be obtained after annealing at 623 K for 4h and air-cooled, meaning that elongation value increased 40% than that of as-extruded sheets while the strength remained almost same. The annealing hold time corresponding with the higher elongation would shorten with the increase of annealing temperature. There is legible necking on broken tensile specimen. The behavior of fracture showed obvious characteristic of ductile rupture, with many tearing edges and cavities.

scholarly journals Effect of Annealing Process on the Mechanical Properties of X70 Pipeline Steel

2018 ◽  
Vol 186 ◽  
pp. 02001
Author(s):  
Teng-wei Zhu ◽  
Cheng-liang Miao ◽  
Zheng Cheng ◽  
Zhipeng Wang ◽  
Yang Cui ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Tensile Strength ◽  
Annealing Temperature ◽  
Pipeline Steel ◽  
Annealing Process ◽  
X70 Pipeline Steel ◽  
Grain Sizes ◽  
Scanning Electron

The influence of the mechanical properties of X70 pipeline steel under different annealing temperature was studied. The corresponding microstructure was investigated by the Field Emission Scanning Electron Microscopy. The results showed that the yield strength and the tensile strength both experienced from rise to decline with the increase of annealing temperature. The grain sizes were coarse and a large amount of cementite precipitated due to preserving temperature above 550 °, which induced matrix fragmentation and deteriorate the -10 ° DWTT Toughness. There were little changes on the microstructure and mechanical properties when the annealing temperature was under 500 °.

scholarly journals Effect of Prior Rolling on Microstructures and Property of Diffusion-Bonded Mg/Al Alloy

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Yunlong Ding ◽  
Jialian Shi ◽  
Dongying Ju
Keyword(s):  
Tensile Strength ◽  
Electron Microscope ◽  
Magnesium Alloy ◽  
Element Distribution ◽  
Annealing Process ◽  
Al Alloy ◽  
Elemental Distribution ◽  
Electron Probe Micro Analyzer ◽  
Cast Magnesium Alloy ◽  
Cast Magnesium

In this study, magnesium alloy AZ91, which was cast by double roll casting system, was rolled by a rolling mill. Then, rolled magnesium alloy and magnesium alloy without being rolled were, respectively, welded with aluminum alloy 6061 by diffusion bonding method. Furthermore, annealing process was applied to refine the microstructure and improve mechanical property. The microstructure and elemental distribution of diffusion zone were investigated with a scanning electron microscope (SEM), an electron probe micro analyzer (EPMA), and a transmission electron microscope (TEM). In addition, hardness and tensile strength were measured. When cast magnesium alloy was used, the width of diffusion layers was wider than that with rolled magnesium alloy. And the width increased with the increasing annealing temperatures. Element distribution of specimens with annealing was more uniform than that did not undergo annealing process. Furthermore, tensile strength turns to be strongest after annealing at 250°C. And the strength of the specimens with rolled magnesium alloy was stronger than that with cast magnesium alloy which was not rolled.

Influence of Homogenizing Annealing Process on Microstructure and Mechanical Properties of as-Cast Mg-Gd-Y-Zr Magnesium Alloy

2010 ◽  
Vol 34-35 ◽  
pp. 1578-1582
Author(s):  
Li Jun Dong ◽  
Quan Yi Yang ◽  
Xin Yu Huang
Keyword(s):  
Magnesium Alloy ◽  
Annealing Temperature ◽  
Annealing Process ◽  
Dendritic Segregation ◽  
Main Role ◽  
X Ray Diffraction ◽  
X Ray ◽  
Homogenizing Annealing ◽  
Before And After ◽  
Zr Alloy

The effects of homogenizing annealing process on the microstructures and properties of Mg-Gd-Y-Zr magnesium alloy were investigated and the fracture of specimens before and after homogenizing annealing was also analysized by optical microscopy，X-ray diffraction analysis etc．The results show that after homogenizing annealing，dendritic segregation is almost eliminated and the microstructures and properties of alloy are improved. The annealing temperature played a main role in homogenizing of Mg-Gd-Y-Zr alloy. The optimal homogenizing annealing process is at 480°C for 8h．

scholarly journals Twin-Roll Casting after Intensive Melt Shearing and Subsequent Rolling of an AM30 Magnesium Alloy with Addition of CaO and SiC

2015 ◽  
Vol 828-829 ◽  
pp. 35-40 ◽  
Author(s):  
Hajo Dieringa ◽  
Sanjeev Das ◽  
Dmitry Eskin ◽  
Zhong Yun Fan ◽  
Lydia Katsarou ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Magnesium Alloy ◽  
High Performance ◽  
The European Union ◽  
Twin Roll Casting ◽  
Melt Treatment ◽  
Roll Casting ◽  
Wrought Magnesium Alloy ◽  
Magnesium Melt ◽  
Twin Roll

Intensive melt shearing is a process that can be used for mixing ceramic particles into magnesium melt. It applies shear stress to the melt and can de-agglomerate nanoparticle additions to magnesium melts without the use of electromagnetic fields or ultrasound. A wrought magnesium alloy AM30 was selected for processing with intensive melt shearing and subsequent twin-roll casting. AM30 with additions of CaO and SiC were also processed by this route and the hardness and microstructure were investigated. Sheets were rolled and their tensile strength was determined. The work was done as part of the European Union research project ExoMet. Its target includes the production of high-performance magnesium-based materials by exploring novel grain refinement and nanoparticle addition in conjunction with melt treatment by means of external fields.

Effect of Different Annealing Process for Microstructure and Properties of 1200MPa HSLA Steel

2015 ◽  
Vol 713-715 ◽  
pp. 2653-2657
Author(s):  
Yu Pei ◽  
Zhe Gao ◽  
Yi Liu ◽  
Shi Qian Zhao ◽  
Chang Yu Xu ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Room Temperature ◽  
Annealing Temperature ◽  
Hsla Steel ◽  
High Strength ◽  
Annealing Process ◽  
Air Cooling ◽  
Low Carbon ◽  
Slow Cooling ◽  
Microstructure And Properties

For C-Si-Mn low carbon HSLA(High Strength Low Alloyed) steel, the influence of microstructure and properties were researched on the different annealing processes. The result showed that the microstructure at room temperature of the steel were polygonal ferrite, island martensite and punctate bainite. With the increase of the annealing temperature, the content of martensite and bainiteincreased and the content of ferrite decreased. Accordingly, tensile strengthincreased from 1069MPa to 1498MPa, and the elongation decreased from 13.8% to 5.1%. With the increase of the overaging temperature, tensile strength decreased from 1315MPa to 1152MPa, and the elongationincreased from8.5% to9.8%. Finally, the optimum annealing process obtained that the annealing temperature was 820°C for 80s, slow cooling to 680°C, water quenching to room temperature, the overaging temperature was 280°C for 300s and air cooling to room temperature. The material obtained higher tensile strength and better elongation.

Effect of the Continuous Annealing Process on Microstructure and Mechanical Properties of DP590 Steel

2013 ◽  
Vol 395-396 ◽  
pp. 313-317 ◽  
Author(s):  
Hong Bin Wang ◽  
Rui Xing ◽  
Yi Yao Yu ◽  
Ji Guang Li ◽  
Ji Hong Yang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Annealing Temperature ◽  
Annealing Process ◽  
Continuous Annealing ◽  
Martensite Content ◽  
Microstructure And Mechanical Properties ◽  
Cold Rolled

The microstructure and mechanical properties of the continuous annealing DP590 steel produced by a cold rolled plant were studied by utilizing a Gleeble thermal simulator tested machine. The results show that, increasing annealing temperature can not effectively improve the martensite content in the steel and annealing temperature be set at 780 °C and 800 °C is rational. Martensite decomposition at high overaging temperature will decrease tensile strength of the samples. As the overaging temperature sets at 250 °C ~ 300 °C, the samples could achieve tensile strength more than 600 MPa, which meet the requirements of DP590.

Pre-control of Annealing Temperature on the Uniformity of Deformed Structure of Wrought Magnesium Alloy

2021 ◽  
pp. 130820
Author(s):  
Jing Tian ◽  
Jiafei Deng ◽  
Rong Ma ◽  
Yuanyin Chang ◽  
Wei Liang ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Annealing Temperature ◽  
Wrought Magnesium Alloy

MAGNESIUM AZ31B

Alloy Digest ◽  
1962 ◽  
Vol 11 (9) ◽  
Keyword(s):  
High Temperature ◽  
Magnesium Alloy ◽  
Physical Properties ◽  
Room Temperature ◽  
Heat Treating ◽  
General Purpose ◽  
Bearing Strength ◽  
Temperature Performance ◽  
Wrought Magnesium Alloy ◽  
Metal Products

Abstract Magnesium AZ31B is a general purpose wrought magnesium alloy for room temperature service. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive, shear, and bearing strength as well as creep. It also includes information on low and high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: Mg-53. Producer or source: The Dow Metal Products Company.

Structural Changes of UHV Deposited Titanium Thin Films in Presence of Oxygen Flow and Temperature

2011 ◽  
Vol 110-116 ◽  
pp. 1094-1098
Author(s):  
Haleh Kangarlou ◽  
Mehdi Bahrami Gharahasanloo ◽  
Akbar Abdi Saray ◽  
Reza Mohammadi Gharabagh
Keyword(s):  
Room Temperature ◽  
Structural Changes ◽  
Annealing Temperature ◽  
Annealing Process ◽  
Oxygen Flow ◽  
Glass Substrates ◽  
Annealing Temperatures ◽  
Titanium Thin Films ◽  
Deposition Angle ◽  
Ti Films

Ti films of same thickness, and near normal deposition angle, and same deposition rate were deposited on glass substrates, at room temperature, under UHV conditions. Different annealing temperatures as 393K, 493K and 593K with uniform 8 cm3/sec, oxygen flow, were used for producing titanium oxide layers. Their nanostructures were determined by AFM and XRD methods. Roughness of the films changed due to annealing process. The gettering property of Ti and annealing temperature can play an important role in the nanostructure of the films.

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