Control of Microstructures and Textures in Nanocrystalline Fe-50wt%Ni Foil

2007 ◽  
Vol 124-126 ◽  
pp. 1181-1184 ◽  
Author(s):  
Jong Kweon Kim ◽  
Shi Hoon Choi ◽  
Yong Bum Park
Keyword(s):  
Mechanical Properties ◽  
Grain Growth ◽  
Rapid Growth ◽  
Texture Evolution ◽  
Texture Development ◽  
Annealed Specimen ◽  
Electrodeposition Method ◽  
Texture Change ◽  
Ni Alloy

The texture development and the mechanical properties were investigated in a nanocrystalline Fe-50wt%Ni alloy fabricated by using an electrodeposition method. The as-deposited texture was characterized by a mixture of major <100>//ND and minor <111>//ND fibre components. Grain growth occurred in the specimen during annealing above 410oC, and resulted in the texture change that the <111>//ND fibre component developed strongly with decreasing <100>//ND fibre component. This texture evolution was attributed to the abnormally rapid growth of the <111>//ND grains, which became much coarser than the <100>//ND and other oriented grains in the fully annealed specimen.

Development of Growth Texture in Nanocrystalline Fe-Ni Alloys

2005 ◽  
Vol 495-497 ◽  
pp. 749-754 ◽  
Author(s):  
Chang Sik Ha ◽  
Yong Bum Park
Keyword(s):  
Energy Density ◽  
Grain Growth ◽  
Fibre Type ◽  
Texture Evolution ◽  
Orientation Dependence ◽  
Texture Development ◽  
Fibre Texture ◽  
Abnormal Growth ◽  
Ni Alloys ◽  
Texture Change

In electroformed pure Ni and Fe-Ni alloys with nanometer-sized crystallites, grain growth that takes place during annealing results in a common texture change. With regard to the macrotextures, the as-deposited textures were of fibre-type characterized by strong <100>//ND and weak <111>//ND components, and the texture development due to grain growth was defined by strong <111>//ND fibre texture with the minor <100>//ND components. It was clarified by means of the microtexture analysis that abnormal growth of the <111>//ND grains occurs in the early stages of grain growth. The possible effects of the abnormal grain growth on the texture evolution have been discussed in terms of the orientation dependence of energy density.

Grain Growth and Mechanical Properties of Nanograined Bulk Fe-25Ni Alloy

2005 ◽  
Vol 475-479 ◽  
pp. 3459-3462
Author(s):  
Hong Bin Wang ◽  
Xiao Yu Wang ◽  
J.H. Zhang ◽  
T.Y. Hsu
Keyword(s):  
Mechanical Properties ◽  
Grain Growth ◽  
Coarse Grained ◽  
Growth Exponent ◽  
Face Centered Cubic ◽  
X Ray Diffraction ◽  
Ni Alloy ◽  
Face Centered ◽  
Fcc Phase

The grain growth and mechanical properties of nanograined bulk Fe-25at%Ni alloy prepared by an inert gas condensation and in-situ warm consolidation technique were investigated. About 43% high temperature face-centered-cubic (FCC) phase and 57% low temperature body-centered-cubic (BCC) phase were observed in the sample at room temperature, which was significantly different from that of the corresponding conventional coarse-grained alloy. The in-situ X-ray diffraction results show that the start and the finish temperature of BCC to FCC phase transformation are 450°C and 600°C, respectively. The isothermal grain growth exponent n from t k D D n n ¢ = − 1 0 1 for nanograined single FCC phase Fe-25at%Ni alloy is 0.38 at 750 °C . The mechanical properties changing with the grain size were studied by means of microindentation test.

scholarly journals Observation of the Texture Evolution by Grain Growth in Fe-50%Ni Alloy Using SEM-ECC-ECP Technique

1990 ◽  
Vol 54 (5) ◽  
pp. 517-524
Author(s):  
Jirou Harase ◽  
Ryo Shimizu ◽  
Yasuhiro Shimizu ◽  
Kenzo Iwayama ◽  
Hidehiko Sumitomo
Keyword(s):  
Grain Growth ◽  
Texture Evolution ◽  
Ni Alloy

Texture Development in Pure Mg and Mg Alloy AZ31

2005 ◽  
Vol 495-497 ◽  
pp. 623-632 ◽  
Author(s):  
Günter Gottstein ◽  
T. Al Samman
Keyword(s):  
Static Recrystallization ◽  
Texture Evolution ◽  
Texture Development ◽  
Mg Alloy ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Alloy Az31 ◽  
The Poor ◽  
Texture Change ◽  
Similar Texture

Texture evolution in pure Mg and Mg alloy AZ31 during deformation and annealing was investigated. The poor low temperature ductility can be attributed to both, insufficient shear systems and unfavorable deformation geometry. Static recrystallization was shown to proceed discontinuously despite little texture change. High temperature deformation was accompanied by dynamic recrystallization with similar texture development as during static recrystallization.

Evolution of Cube Texture in Cu-45at.%Ni Alloy Substrates for YBCO Coated Conductors

2015 ◽  
Vol 778 ◽  
pp. 105-109
Author(s):  
Hui Tian ◽  
Yi Wang ◽  
Pan Wang ◽  
Ya Ru Liang ◽  
Lin Ma ◽  
...  
Keyword(s):  
Grain Growth ◽  
Texture Evolution ◽  
Cube Texture ◽  
Rolling Texture ◽  
Coated Conductors ◽  
Recrystallization Process ◽  
Ni Alloy ◽  
Back Scattering ◽  
Cold Rolled ◽  
Ybco Coated Conductors

The cube texture evolution during annealing of the heavy cold-rolled Cu-45at.%Ni alloy tapes were investigated by XRD and electron back scattering diffraction techniques. The results indicated that the fraction of Copper-type rolling texture was slightly strengthened during recovery, and then strongly reduced during recrystallization. The cube texture was formed by consuming the rolling texture components during recrystallization process, and the S, Copper and Brass orientations were consumed together via cube grain growth. A strong cube-textured Cu-45at.%Ni alloy substrate with the cube texture fraction of 98.6 % (< 10°) was obtained after annealing at 1000 oC for 1 h.

Grain Growth and Texture Development in Nanostructured Invar Alloy

2004 ◽  
Vol 467-470 ◽  
pp. 1313-1318 ◽  
Author(s):  
Jong Kweon Kim ◽  
Jun Hyuk Seo ◽  
Yong Bum Park
Keyword(s):  
Grain Growth ◽  
Texture Evolution ◽  
Orientation Imaging Microscopy ◽  
Orientation Dependence ◽  
Invar Alloy ◽  
Abnormal Growth ◽  
Orientation Imaging ◽  
Invar Alloys ◽  
Low Thermal Expansion ◽  
Texture Change

In the present work, a nanocrystalline Invar alloy (Fe-36wt%Ni) foil was fabricated by using a continuous electroforming method. This material exhibited outstanding mechanical properties and a relatively low thermal expansion coefficient as compared to conventional Invar alloys. The as-deposited texture was of fibre-type characterized by strong <100>//ND and weak <111>//ND components. Grain growth occurred during annealing beyond 350°C and resulted in such texture change that the <111>//ND fibre texture strongly developed with the minor <100>//ND components. It was clarified using orientation imaging microscopy that abnormal growth of the <111>//ND grains in the early stages of grain growth plays an important role on the texture evolution. The mechanism of the abnormal grain growth has been discussed in terms of the orientation dependence of energy density.

scholarly journals Atomistic modelling of functionally graded Cu-Ni alloy and its implication on the mechanical properties of nanowires

2021 ◽  
Author(s):  
Md Shajedul Hoque Thakur ◽  
Mahmudul Islam ◽  
Nur Jahan Monisha ◽  
Pritom Bose ◽  
Md. Adnan Mahathir Munshi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Functionally Graded ◽  
Atomistic Modelling ◽  
Ni Alloy

scholarly journals Mean Field Analysis of Orientation Selective Grain Growth Driven By Interface-Energy Anisotropy

1994 ◽  
Vol 343 ◽  
Author(s):  
J. A. Floro ◽  
C. V. Thompson
Keyword(s):  
Grain Size ◽  
Size Distribution ◽  
Grain Growth ◽  
Texture Evolution ◽  
Mean Field ◽  
Orientation Distribution ◽  
Interface Energy ◽  
Abnormal Grain Growth ◽  
Field Analysis ◽  
Energy Anisotropy

ABSTRACTAbnormal grain growth is characterized by the lack of a steady state grain size distribution. In extreme cases the size distribution becomes transiently bimodal, with a few grains growing much larger than the average size. This is known as secondary grain growth. In polycrystalline thin films, the surface energy γs and film/substrate interfacial energy γi vary with grain orientation, providing an orientation-selective driving force that can lead to abnormal grain growth. We employ a mean field analysis that incorporates the effect of interface energy anisotropy to predict the evolution of the grain size/orientation distribution. While abnormal grain growth and texture evolution always result when interface energy anisotropy is present, whether secondary grain growth occurs will depend sensitively on the details of the orientation dependence of γi.

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