Analysis of Preform Annealing Process for the Aluminum Automotive Door Inner Panel

2016 ◽  
Vol 850 ◽  
pp. 618-624
Author(s):  
Yu Juan Yang ◽  
Jian Pin Lin ◽  
Bin Wang
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Annealing Time ◽  
Annealing Treatment ◽  
Annealing Process ◽  
Geometric Shape ◽  
Complex Geometric Shape ◽  
Deformation Amount

To improve the formability of aluminum alloy, a new forming technique-the preform annealing process is proposed. Based on the mechanical properties of the original aluminum alloy AA5182-O with two experienced preforming annealing treatment, and preforming annealing process of a complex geometric shape aluminum door inner panel was numerical simulated by using LS-DYNA software. As a result, the effects of annealing time at 365°C on stamping height of the panel and the optimum annealing time were obtained. The results showed that the preform annealing process was feasible in the door inner panel. At 365°C, the smooth forming of the door inner panel was achieved after annealing for 20s with the pre-deformation amount 97mm, Which are the most suitable parameters.

Effects of annealing treatment on mechanical properties of 8011 aluminum alloy after cryogenic rolling

2019 ◽  
Vol 116 (2) ◽  
pp. 219 ◽  
Author(s):  
Junjun Cui ◽  
Liqing Chen ◽  
Yanfei Li ◽  
Jiahua Liu ◽  
Jiaqi Xie
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Grain Size ◽  
Tensile Strength ◽  
Aluminum Alloy ◽  
Annealing Treatment ◽  
Energy Dispersive Spectrum ◽  
Second Phase ◽  
Cryogenic Rolling ◽  
The Ideal

In order to improve mechanical properties of roll cast 8011 aluminum alloy (AA 8011) by grain strengthening, and expand its application field, the effect of different annealing treating processes on mechanical properties and microstructures of cryogenic rolled AA 8011 was investigated. The roll cast AA 8011 was cryogenic rolled for six passes and then annealed. The annealing treatment was adopted at 100–300 °C for 1 h, and then the annealing treatment was adopted at 220 °C for 10–80 min. The microstructures of AA 8011 under roll cast and cryogenic rolled states were studied by using OM. The grain size was calculated by the Image-pro-plus 5.0. The microstructures of AA 8011 under annealing states were observed by using TEM and energy dispersive spectrum analysis. The results show that the second phase Al8Fe2Si appears in the cryogenic rolled AA 8011 after annealing treatment. When the dislocation moves in the grain, the dislocation plays a pinning role, which is conducive to grain refinement. The optical annealing treatment was treated at 220 °C for 40 min with optimal thermal stability. The ideal grain size is 1 μm, hardness is 65 HV, and tensile strength is 202 MPa. It is about 1.5 times of the roll cast AA 8011.

Effect of Annealing on Mechanical Properties of Copper Alloys Deformed at Cryogenic Temperature

2013 ◽  
Vol 745-746 ◽  
pp. 363-370 ◽  
Author(s):  
Xiao Xiang Wu ◽  
Yu Lan Gong ◽  
Shi Ying Ren ◽  
Jing Mei Tao ◽  
Yan Long ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Annealing Temperature ◽  
Uniform Elongation ◽  
Copper Alloys ◽  
Annealing Treatment ◽  
Annealing Process ◽  
Optimal Annealing Temperature ◽  
Elongation To Failure ◽  
Cold Rolled ◽  
Zn Alloys

The effect of annealing treatment on the mechanical properties and microstructure of cold-rolled Cu-20% Zn alloys was investigated in this work. Mechanical properties changed dramatically with the increase of temperature. According to the microhardness test, it can roughly concluded that 150 is the optimal annealing temperature for deformation, at which a uniform elongation increased from 1.4658% before annealing to about 6.89%, and the elongation to failure increased from 7.426% to 16.81% with the same strength almost retained. The changes of microstructure during the annealing process are mainly distributed to the improvement of mechanical properties.

Effect of Annealing Temperature on Mechanical Properties of Cold Drawn Pearlitic Steel Wires

2006 ◽  
Vol 118 ◽  
pp. 31-34 ◽  
Author(s):  
Won Jong Nam ◽  
Hyung Rak Song ◽  
Kyung Tae Park
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Annealing Time ◽  
Annealing Temperature ◽  
Annealing Treatment ◽  
Pearlitic Steel ◽  
High Annealing Temperature ◽  
Annealing Temperatures ◽  
Steel Wires ◽  
High Annealing

The effects of annealing temperature and annealing time on mechanical properties of cold drawn pearlitic steel wires containing 0.84wt% of silicon were investigated. Annealing treatment was performed on cold drawn steel wires for the temperature range of 200°C to 450°C with the different annealing time of 30sec, 1min, 15min and 1hr. The increase of tensile strength at the low annealing temperatures would be related with strain ageing behavior, while the decrease of tensile strength at the high annealing temperature is due to the spheroidization of cementite plates and the occurrence of recovery of the lamellar ferrite in the pearlite.

Effect of Bell-Type Annealing Process on Properties of SPCC Cold-Rolled Steel Sheet

2011 ◽  
Vol 704-705 ◽  
pp. 1123-1127
Author(s):  
Zhi Hua Wang ◽  
Yan Ping Zhao ◽  
Yun Tao Li ◽  
Jun Wang ◽  
Jian Zhang
Keyword(s):  
Mechanical Properties ◽  
Plastic Strain ◽  
Annealing Time ◽  
Steel Sheet ◽  
Annealing Process ◽  
Annealed Specimen ◽  
Rolled Steel ◽  
Cold Rolled Steel ◽  
Rolled Specimen ◽  
Cold Rolled

This study simulated Bell-type annealing technology under laboratory conditions, and researched the effect of annealing time on the mechanical properties of SPCC cold-rolled steel sheet. The results indicate that the yield strength decreased with the extending of time; the plastic strain increases with the elongation of annealing time till a given time, and then decreased with the time extending; the cold-rolled specimen brittle fractured in tension while the annealed specimen shear fractured. Key words: microstructure mechanical properties Bell-type annealing SPCC cold-rolled steel sheet

Effects of Alloy Composition and Annealing Treatment on the Performance of Aluminum Conductor

2013 ◽  
Vol 652-654 ◽  
pp. 1016-1022
Author(s):  
Wen Ping Chen ◽  
Yong Su ◽  
Ping Hu ◽  
Yan Jiang
Keyword(s):  
Mechanical Properties ◽  
Annealing Temperature ◽  
Alloy Composition ◽  
Annealing Treatment ◽  
Annealing Process ◽  
Orthogonal Test ◽  
Holding Time ◽  
Test Analysis ◽  
Elongation At Break ◽  
Iron Copper

Discuss how iron, copper and magnesium alloy and rare earth cerium influence the electrical and mechanical properties of aluminum conductor using the orthogonal test, to thereby get the best alloy composition that meets the requirement; through test analysis on the conductivity, intensity and elongation at break of aluminum conductor with the best alloy composition, discuss the influence of different annealing temperature and holding time on their performance. The results show that: the best material composition of the aluminum alloy conductor would be 0.25% Fe, 0.40% Cu, 0.05% Mg, 0.30% Ce, 0.008% B, and aluminum and inevitable impurities. The intensity, elongation at break and conductivity of this aluminum conductor would be 110N/mm2, 30.0% and 62.2%IACS respectively. The best annealing process parameters are annealing temperature of 310°C, and holding time for 30min, direct air cool. The intensity of aluminum conductor processed is 129 N/mm2, and the elongation at break, resistivity, and conductivity are 15.0%, 2.782×10-8Ω•m and 62%IACS respectively. The mechanical properties and conductivity of this aluminum conductor both comply with the requirements of wire and cable conductor cores.

Study on Preparation of Hard Elastic Polypropylene Fibers

2013 ◽  
Vol 743-744 ◽  
pp. 414-419
Author(s):  
Si Deng Zhang ◽  
Xu Zhen Zhang ◽  
Bin Sun ◽  
Long Chen ◽  
Zhi Yan Ma ◽  
...  
Keyword(s):  
Annealing Time ◽  
Melt Spinning ◽  
Annealing Temperature ◽  
Elastic Recovery ◽  
Annealing Treatment ◽  
Annealing Process ◽  
Fiber Axis ◽  
Polypropylene Fibers ◽  
Structure And Property ◽  
Velocity Anisotropy

Polypropylene pre-oriented multifilament were made by melt spinning with fast winding, and then hard elastic polypropylene fibers were made followed by annealing treatment under some conditions. The effects of the conditions of melt spinning and annealing process on the elasticity of polypropylene fibers were studied. The structure and property of hard elastic polypropylene fibers were analyzed by DSC,WAXD,SAXS and Sound velocity anisotropy. The results showed that the hard elasticity of annealed fibers increased with the improving of speed of winding, and the elasticity also increased with the improving of annealing temperature and extension of annealing time, and the elastic recovery rate of PP multifilament can be as high as 93.6%. The crystal phase of unannealed and annealed PP fibers did not change. Annealing leaded to form perfectly the characteristic crystalline structure of crystals of being perpendicular to fiber axis.

scholarly journals Pengaruh Annealing terhadap Sifat Keras dan Struktur Mikro Baja Tahan Karat AISI 410-3Mo-3Ni

Metalurgi ◽  
2020 ◽  
Vol 35 (2) ◽  
pp. 75
Author(s):  
Vinda Puspasari ◽  
Mukhlis Agung Prasetyo ◽  
Januarius Velix Ta’an Halab ◽  
Moch. Syaiful Anwar ◽  
Efendi Mabruri ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Annealing Time ◽  
Annealing Temperature ◽  
Martensitic Steel ◽  
Annealing Treatment ◽  
Delta Ferrite ◽  
Carbide Phases ◽  
Annealing Heat Treatment ◽  
Annealing Heat

AISI 410-3Mo-3Ni stainless steel is a martensitic steel which limited in using when compared to austenitic and ferritic stainless steels. Martensitic steel has an essential role in specific components due to a combination of strength, toughness and excellent corrosion resistance. However, martensitic steel tends to undergo decreasing in mechanical properties and microstructure after the forging process. In this study, mechanical properties and microstructure of the forged AISI 410 after receiving annealing heat treatment will be studied. Annealing aims to reduce material hardness and increase grain refinement of material. Annealing heat treatment is carried out by varying the annealing temperature and time. Annealing temperature variations are 7000, 7600, and 8000C. The annealing time variation is 3 hours and 6 hours. The effect of annealing time and temperature will be studied on the hardness and microstructure of the AISI 410 modified material. The optimum hardness of 35.9 HRC in sample with annealing treatment in 760°C for 6 hours. The microstructure shows delta ferrite, martensite, austenite, and carbide phases which affect hardness value of annealed samples.   

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