Individual grain orientations and texture development of nanocrystalline electrodeposits showing abnormal grain growth

Klement, Uta; Silva, Manoel Ribeiro da

doi:10.1016/j.jallcom.2006.08.118

Cited by 22 publications

(11 citation statements)

References 22 publications

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“…there is a spread of about 10° and 〈411〉 is only used as description of the nearest orientation.) Similar results have been obtained at a step size of 20 nm (Klement & da Silva, 2007). Since the initial grain size is 46 nm, an additional subset (subset3) is produced for comparison, containing only grains between 50 and 100 nm (Fig.…”

Section: Resultssupporting

confidence: 86%

On the orientations of abnormally grown grains in nanocrystalline Ni and Ni–Fe

Klement

Silva

Skrotzki

2008

Journal of Microscopy

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The scanning electron microscopy-based electron backscatter diffraction technique has been used to determine grain orientations of abnormally grown grains upon annealing in nanocrystalline Ni and Ni-20 at.% Fe electrodeposits. The results show that in nanocrystalline Ni and Ni-Fe, the first grown grains that can be detected are 411 oriented with respect to the normal direction (411//ND). Upon annealing, further grain growth occurs and the dominant orientation of the abnormally growing grains changes from 411//ND to 111//ND. Twinning is found to be the mechanism responsible for the orientation change and is for the first time described in connection with abnormal grain growth in nanocrystalline materials. This means that well-known models for the formation of annealing twins (initially introduced in connection with recrystallization) also seem to apply in nanocrystalline materials.

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Section: Resultssupporting

confidence: 86%

On the orientations of abnormally grown grains in nanocrystalline Ni and Ni–Fe

Klement

Silva

Skrotzki

2008

Journal of Microscopy

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“…Such grains appear to grow preferentially during annealing at the expense of the neighboring grains causing strengthening of the h111i//DD fiber texture. [7,8,16,17] There has been a significant fraction of h111i fiber grains observed in the as-deposited microstructure in the present study (Figures 7 and 9), but they did not seem to display a noticeably larger size compared to the rest of the grains, which would straightforwardly point toward their tendency for preferential growth.…”

Section: Resultscontrasting

confidence: 47%

“…The original as-received h001i//DD fiber texture (Figure 4) was replaced by a h111i//DD fiber texture as a result of annealing, which is consistent with the findings reported by others. [7,8,16,17] Figure 11 clearly shows that the h111i fiber axis progressively rotated away from the DD (Z) with increasing distance from the center of the colony. This fiber axis was aligned approximately parallel to the DD in the colony center and followed the radial lines when it deviated from the center.…”

Section: Resultsmentioning

confidence: 99%

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Microscale and Mesoscale Crystallographic Textures of Nanocrystalline Ni-Based Electrodeposits

Čížek

Barnett

Nave

et al. 2010

Metall Mater Trans A

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International audienceThe microscale and mesoscale crystallographic textures observed in nanocrystalline Ni, Ni-20 pct Fe, and Ni-50 pct Fe electrodeposits are described. The nanosized grains are arranged in coarse mesoscale colonies. In the as-deposited state, the bulk texture of the Ni-20 pct Fe alloy displays a dominant aOE (c) 001 > fiber parallel to the macroscopic deposition direction (DD). The grains are elongated along the aOE (c) 001 > crystal lattice direction, which is mostly parallel to the local DD, producing a well-defined aOE (c) 001 >//DD fiber microtexture on a local scale. The grain misorientation histograms show some content of low-angle boundaries, frequently associated with the presence of grain clusters, and are dominated by high-angle boundaries with a possible enhanced frequency of a5 and a7 coincident site lattice boundaries and a significant content of a3 twin boundaries. For all three alloys, the coarsened grains, obtained by annealing, within the mesoscale colonies show a fiber mesotexture characterized by a aOE (c) 111 > axis approximately perpendicular to the colony hemispherical growth surface (parallel to the local DD). It is surmised that a similar "cobblestone" mesotexture with a aOE (c) 001 > fiber axis already exists in the as-received state, as previously proposed by a number of the present authors and as supported by the results on the Ni-20 pct Fe alloy presented her

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“…Accordingly, abnormal grain growth is observed in the case of various nanostructured materials [1][2][3][4][5][6][7][8][9][10]. Stabilization of the fine grained structures is of critical importance for retaining their unique properties [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

A Model for Abnormal Grain Growth in Nano-Crystalline Materials Based on Zener Drag Force

Razavi-Tousi¹,

Yazdani-Rad²,

Manafi³

2012

Archives of Metallurgy and Materials

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Abnormal grain growth of a matrix in which normal grain growth has stagnated due to the presence of fine incoherent ceramic particles is studied. A balance between driving and retarding forces is used as the criteria for estimating the steady state. Random and non-random approaches are applied for coarse and nano-grained structure respectively.Keywords: Grain size, abnormal grain growth, nano-crystalline Badano nieprawidłowy wzrost ziaren w materiale, w którym prawidłowy wzrost ziaren został zahamowany z powodu obecności drobnych cząsteczek ceramicznych. Równowaga pomiędzy siłami pędną i opóżniającą zostały przyjęte jako kryterium oszacowania stanu równowagi. Zastosowano przypadkowe i nieprzypadkowe podejście odpowiednio do struktury grubo i drobnoziarnistej.

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Individual grain orientations and texture development of nanocrystalline electrodeposits showing abnormal grain growth

Cited by 22 publications

References 22 publications

On the orientations of abnormally grown grains in nanocrystalline Ni and Ni–Fe

On the orientations of abnormally grown grains in nanocrystalline Ni and Ni–Fe

Microscale and Mesoscale Crystallographic Textures of Nanocrystalline Ni-Based Electrodeposits

A Model for Abnormal Grain Growth in Nano-Crystalline Materials Based on Zener Drag Force

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