Fabrication of ZK60 magnesium alloy thin sheets with improved ductility by cold rolling and annealing treatment

2012 ◽  
Vol 40 ◽  
pp. 319-323 ◽  
Author(s):  
Wenzhen Chen ◽  
Xin Wang ◽  
Lianxi Hu ◽  
Erde Wang
Keyword(s):  
Magnesium Alloy ◽  
Cold Rolling ◽  
Annealing Treatment ◽  
Thin Sheets ◽  
Cold Rolling And Annealing ◽  
Zk60 Magnesium Alloy

Characteristics of Powder-Rolled and Sintered Sheets Made from HDH Ti Powders

2012 ◽  
Vol 520 ◽  
pp. 281-288 ◽  
Author(s):  
Nho Kwang Park ◽  
C.H. Lee ◽  
Jeoung Han Kim ◽  
Jae Keun Hong
Keyword(s):  
Cold Rolling ◽  
Relative Density ◽  
Tensile Properties ◽  
Process Parameters ◽  
Annealing Treatment ◽  
Powder Rolling ◽  
Powder Size ◽  
Thin Sheets ◽  
Roll Speed ◽  
Roll Gap

In this study, direct powder rolling was applied to make thin sheets from HDH (hydrogenation and dehydrogenation) powders. Effects of materials and process parameters on tensile properties of sintered sheets are investigated. In the direct powder rolling with two-horizontal counter-rotating rollers, materials parameters including powder size and process parameters such as roll gap, roll speed, and packing height are controlled. With -100mesh Ti powders, CP titanium sheets of a thickness up to 1.5mm and a width up to 300mm were obtained without any rolling defects. Sintering of the rolled strips was performed between 1000°C and 1250°C at 50°C intervals for 1hour to 4 hours. The relative density of the sintered strips was found to be around 85 to 90 percent. After sintering, the complete densification was made by cold rolling, and microstructures and tensile properties were evaluated after annealing treatment at 750°C for 2 hours.

The Microstructure Evolution and Control of Alloy 690 during Cold Rolling

2013 ◽  
Vol 573 ◽  
pp. 95-103
Author(s):  
Zhi Hao Yao ◽  
Jian Xin Dong ◽  
Zhi Yong He ◽  
Mai Cang Zhang
Keyword(s):  
Cold Rolling ◽  
Microstructure Evolution ◽  
Dwell Time ◽  
Annealing Temperature ◽  
Annealing Treatment ◽  
Strain Range ◽  
Strain Rates ◽  
Alloy 690 ◽  
Cold Rolling And Annealing ◽  
And Control

The microstructure evolution and control for Alloy 690 during cold rolling and annealing treatment was investigated. Cold rolling specimens were deformed in the strain range from 15% to 70% with strain rates from 0.01 to 10s-1. Subsequent annealing treatment was carried out in the range of 1060~1100°C for dwell time 3~15mins. Rolling reduction, annealing temperature and annealing time except strain rate had obviously influence on grain size and hardness. Little coarsening of grains were observed below 1060°C during annealing treatment, whereas grains coarsened obviously over 1080°C. Besides, the behavior of grain growth for alloy 690 was investigated systematically.

Effects of Normalizing Annealing on the Recrystallization Texture of 4.2wt.%Si Non-Oriented Electrical Steel Thin Sheets

2012 ◽  
Vol 535-537 ◽  
pp. 615-619 ◽  
Author(s):  
Jinlong Liu ◽  
Yu Hui Sha ◽  
Yong Chuang Yao ◽  
Fang Zhang ◽  
Liang Zuo
Keyword(s):  
Cold Rolling ◽  
Recrystallization Texture ◽  
Electrical Steel ◽  
Shear Bands ◽  
Rolling Process ◽  
Thin Sheets ◽  
Conventional Procedure ◽  
Cold Rolling And Annealing ◽  
Cold Rolled ◽  
Normalizing Annealing

The 4.2wt.%Si non-oriented electrical steel thin sheets with the thickness of 0.30mm were produced by the conventional procedure including hot rolling, cold rolling and annealing. The recrystallization texture was analyzed with emphasis on the effect of normalizing annealing. The results show that the  fiber with peak at {111} is weaker and η fiber is stronger in the sheets with normalizing annealing than those without normalizing annealing, either under the cold rolled reduction of 77% or 86%. Effects of normalizing annealing on the recrystallization texture can be explained in terms of the characteristic of the shear bands formed during cold rolling process.

Microstructure and Texture Development in Ti-5Al-5Mo-5V-3Cr Alloy during Cold Rolling and Annealing

2013 ◽  
Vol 551 ◽  
pp. 210-216 ◽  
Author(s):  
Alireza Ghaderi ◽  
Peter D. Hodgson ◽  
Matthew R. Barnett
Keyword(s):  
Cold Rolling ◽  
Electron Backscatter Diffraction ◽  
Texture Evolution ◽  
Shear Bands ◽  
Annealing Treatment ◽  
Β Phase ◽  
Three Samples ◽  
Cold Rolling And Annealing ◽  
Cold Rolled ◽  
Phase Sample

This study focuses on the microstructure and texture evolution of a Ti-5Al-5Mo-5V-3Cr alloy during cold rolling and annealing treatments. Three samples with different initial microstructures were cold rolled to a 40% reduction in thickness. The starting microstructure of one sample was single β phase while two other specimens were α+β phases with different α particle sizes, distributed in β grains. For all three samples, the average size of primary β grains was 150 µm. The cold rolled specimens were then annealed at 860 °C (10 °C above the β transus temperature) for 5 minutes followed by water quenching. Microstructure development during cold rolling and recrystallization was studied by scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD) technique. Microstructure investigations showed that massive amount of shear bands occurred during the cold rolling of the single β phase sample while only a few shear bands were observed in the α+β cold rolled microstructures. The cold rolled texture of the sample comprised of a single β phase contains a gamma fibre (//ND) and a partial alpha fibre (//RD). Annealing treatment decreased the intensity of the cold rolled texture in the single β phase sample. Also, it was found that the presence of α precipitates changes the common annealing texture observed in the single β phase specimen.

Grain Refinement of Magnesium Alloy AZ31 by Repeated Cold Rolling and Annealing

2011 ◽  
Vol 686 ◽  
pp. 151-156
Author(s):  
Xing Pin Chen ◽  
Rui Xiao ◽  
Can Sun ◽  
Zhen Xia Lin ◽  
Qing Liu
Keyword(s):  
Magnesium Alloy ◽  
Cold Rolling ◽  
Grain Refinement ◽  
Tensile Tests ◽  
Alloy Az31 ◽  
Magnesium Alloy Az31 ◽  
Fracture Elongation ◽  
Az31 Sheet ◽  
Cold Rolling And Annealing ◽  
Equiaxed Grains

This work focused on the grain refinement and investigation its effect on the microstructural evolution and mechanical properties. The magnesium alloy AZ31 sheet was processed by repeated cold rolling and recrystallized annealing. From the experimental works, the fine and equiaxed grains with less than 5 μm were achieved. It was found that for annealing at temperatures in the range of 523–673K, sample was fully recrystallized less than 30 minutes and after that the growth of the recrystallized grains is slight. Finally, the tensile tests were carried out to analyze the changes in the strength and fracture elongation.

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