111 fibre texture
137104149
Formation of {111} fibre texture in recrystallised aluminium sheet
Abstract The deep drawability of commercial purity aluminium sheets is improved by introducing a (in fcc materials rather unusual) {111} fibre texture in the sheet surface layers. An additional step of warm rolling after the conventional hot and cold rolling leads to the formation of a pronounced shear texture in the sheet surface layers. During the final recrystallisation annealing, the desired {111} texture prevails at the expense of the other shear texture components. The present paper aims to clarify the mechanisms of the formation of {111}ND orientations during both warm rolling and recrystallisation. The effect of the {111} surface texture on the plastic anisotropy of the resulting sheets is discussed.
Olaf Engler Hyun Chul Kim Moo Young Huh
138726228
INFLUENCE OF DISSOLVED CARBONIC CONTENT FOR (111)FIBRE TEXTURE IN HIGH PURITY AND ULTRA LOW CARBONIC 08AL DEEP DRAWING STEEL SHEET
The influence of dissolved carhonic content for (111) fibre texture in high purity and ultra low carbonic 08AI deep drawing steel sheet was investigated and the variations of orientation densities with carbonic content for (111) (112) and(111) (110) textures were analyzed by three dimensional orientation distribution function. It is found that the (111) pole density increases with the decrease of carbonic content and with the increase of reduction in thinkness and I_((111)(112)/I_((111)(110))decreases with the increase of carbonic content.
Zhao Xian
137245601
Surface {111} fibre texture of a strip cast aluminium
Solidified aluminlum usually has a 100} fibre texture [1] which is believed to be caused by the effect of selective grain growth. The selective growth of 100 grains might be attributed to the suitable geometrical configuration of the fastest growing dendrite tips [2,3] Not only in aluminium, the selective growth of 100) grains also occurs in other FCC metals [4 6] leading to the (100} texture. However, the 100) texture does not always develop, and in some cases, 111 fibre texture is formed in solidified FCC metals [7] The competition between these two textures is affected by growth conditions. It has been demonstrated that the 111 texture develops preferentially under planar growth conditions, while the 100 texture usually develops under dendritic growth conditions [7 9]
D Y Li Jerzy A Szpunar
135802877
Development of <111> Fibre Texture in a Fe through the Diffusional Process without g a Transformation
Kunio Ito Hideo Abe Yun chao Wu Sakichi Goto
136010377
Development of g fibre recrystallisation texture in medium chromium ferritic stainless steels
Abstract The texture development and g fibre recrystallisation texture formation mechanism of ferritic stainless steels under different rolling processes were investigated. It was shown that the surface texture development was absolutely different from the centre texture development. In conventional rolled band, strong a fibre was formed at the centre layer and it was weakened after hot band annealing; after cold rolling, the centre texture was characterised by sharp a fibre and weak g fibre with a peak at {111}<110> and non uniform g fibre recrystallisation texture was developed. By contrast, in warm rolled band, the centre texture consisted of weakened a fibre and sharpened g fibre, and {111}<112> became the prominent component after hot band annealing. The a fibre and g fibre with a peak at {111}<112> were intensified at the centre texture after cold rolling, resulting in the formation of uniform g fibre recrystallisation texture. It was indicated that the formation mechanism of g fibre recrystallisation texture was closely dependent on hot rolling process.
Fei Gao Zhen-Yu Liu H -T Liu S -M Zhang Arthur M Dong Yansen Hao Guodong Wang
95415364
Orientation relationship between indium films and GaSb(111)B: annealing induced transformation of fibre texture into heteroepitaxy
Abstract X ray diffraction analysis is used to characterise structural properties of indium thin films deposited on GaSb(1 1 1)B substrates. The thin films, serving as ohmic contacts, are prepared by thermal evaporation at 27degC and subsequent annealing in the range of 250 600degC for 5 min. Texture measurements show that the as deposited thin films possess a very strong fibre texture with the In(1 0 1) plane oriented preferentially parallel to the substrate surface. During the annealing procedure, the thin films recrystallize and an epitaxial relationship develops between the thin film and the GaSb substrate with In(1 0 1)|GaSb(1 1 1) and In[0 1 0]|GaSb[1 1 0] The degree of the thin film recrystallization depends on the annealing temperature. Moreover, the pole figure measurements suggest that the nucleation of indium atoms starts on one GaSb(1 1 1)B plane (oriented parallel to substrate surface) and three GaSb(1 1 1)A planes (constituting an angle of 70.5deg with the substrate surface)
Jozef Keckes Balder Ortner J Jakabovic Jaroslav Kovac
135808294
Local texture of three stage CVD SiC fibre by precession electron diffraction (PED) and XRD
Abstract SiC fibre with the transverse isotropic properties is very important to it reinforced metal matrix composites. In this paper, local texture of the CVD SiC fibre was investigated by means of X ray diffraction (XRD) and precession electron diffraction (PED) on transmission electron microscopy (TEM) The result from XRD is in agreement with the result obtained from PED. And the result shown that at the first stage of deposition, the preferred direction of SiC grains is almost random and the distribution of grain size is scattered. At the second and third stages of deposition, there are two kinds of texture in SiC fibre, that is, (110)<111> and (110)<115> Furthermore, the grain size at the second and third stages is about 200 nm and it is lower at the third stage than at the second stage because of the lower temperature at the third stage. The [110] preferred direction along axial direction for SiC fibre is beneficial to the axial tensile strength.
B Huang Yu Qiang Yang M H Li Yi Chen X Luo Maoshen Fu You-jyun Chen Xierong Zeng
96123505
Contact potential difference study of the growth of palladium on <111> fibre textured aluminum thin films
Abstract The room temperature growth of palladium on <111> fibre textured aluminum thin films has been studied by the contact potential difference (CPD) method. As the Pd film thickens, there is an initial decrease in the CPD which reaches a minimum at approximately 0.25 monolayers of Pd added. From this point, the CPD increases almost linearly to the 4 to 5 monolayer range where an inflection in the curve occurs. Added Pd increases the CPD further until a leveling off begins around 7 to 8 monolayers. The saturation value is 1.38 eV. This value matches the bulk work function difference between the (111) Pd and Al surfaces. Reflection high energy electron diffraction (RHEED) patterns confirmed the <111> fibre texture of the bilayers and indicated that the bulk palladium lattice parameter had been attained. These results support recent ion scattering and photoemission spectroscopic results for thin palladium films on aluminum.
Anthony G Domenicucci Richard W Vook
139306969
Effect of hot band annealing on inclusions, texture, and magnetic properties of 2.97%Si 0.59% Al non oriented silicon steel
ABSTRACT Effects of hot band annealing on inclusions, texture and magnetic properties of the 2.97%Si 0.59%Al non oriented silicon steel sheet with 0.3 mm in thickness were investigated by scanning electron microscope and Electron Backscattered Diffraction (EBSD) With the increase of hot band annealing temperature, the inclusions of 0.1 1 mm in hot band obviously reduced, the area fraction of {100}<110> texture prominently increased during recrystallization of hot band. However, the area fraction of {100}<110> dramatically dropped, and a fibre texture, {111}<112> significantly developed during grain growth of hot band. The texture of the final sheets was dominated by a* fibre texture, {001}<130> and g fibre texture. Furthermore, increasing of hot band annealing temperature increased the grain size, strengthen th fibre texture and weaken g fibre texture of the final sheets, resulting in the improvement of the magnetic induction and iron loss.
Jia-long Qiao Lianhe Liu Fei-hu Guo Li Xiang Sheng-tao Qiu Hai jun Wang
214552033
Microstructure, texture and hardness of a metastable b titanium alloy after bar rolling and annealing
Abstract The microstructure and texture evolution of a metastable Ti 5Al 3V 3Mo 2Cr 2Zr 1Nb 1Fe alloy during bar rolling and after various thermal treatments was investigated by high energy synchrotron diffraction and electron backscatter diffraction. Bar rolling is applied in the (a+b) phase field in order to achieve a bi modal (duplex) microstructure. The effect of dynamic recrystallized and recovered zones on texture of Ti5321was analyzed separately, as well as the texture of primary a precipitates and secondary a lamellae. The texture of the recovered zones is characterized by a cube component {001} plus a and g fibre with dominant {100} {112} {111} components, while the texture of the recrystallized zones is a strong cube texture. After aging or recrystallization plus aging, this texture component remains, while it disappears after solution treatment. The primary a precipitates have their c axes perpendicular to the rolling direction and do not follow the Burgers orientation relationship. This texture characteristics remains after various thermal heat treatments. Secondary a lamellae obey the Burgers orientation relationship. Moreover, a variant selection of secondary a lamellae occurs. The mechanism of texture formation of the b phase and the precipitation behavior of the a phase is discussed. The hardness increase can be attributed to size, shape and volume fraction of the a precipitates. Different combinations of primary a and secondary a precipitates make an increase in hardness of about 11%
B Gu Paul Chekhonin Rolf Schaarschuch C -G Oertel She-wei Xin Chaoli Ma Le Zhou Weimin Gan Werner Skrotzki