scholarly journals TiN/γ-Fe interface orientation relationship and formation mechanism of TiN precipitates in Mn18Cr2 steel

China Foundry ◽  
2021 ◽  
Vol 18 (3) ◽  
pp. 180-184
Author(s):  
Zheng-hui Wang ◽  
Jing-pei Xie ◽  
Qian Li ◽  
Wen-yan Wang ◽  
Ai-qin Wang ◽  
...  
Keyword(s):  
Orientation Relationship ◽  
Formation Mechanism ◽  
Interface Orientation

The symmetry origin of the austenite-cementite orientation relationships in steels

2019 ◽  
Vol 234 (4) ◽  
pp. 237-245 ◽  
Author(s):  
Valentin Kraposhin ◽  
Alexander Talis ◽  
Nenad Simich-Lafitskiy
Keyword(s):  
Crystal Structure ◽  
Orientation Relationship ◽  
Formation Mechanism ◽  
Mutual Orientation ◽  
Crystallographic Group ◽  
Mutual Transformation ◽  
Orientation Relationships ◽  
Nucleus Formation ◽  
Crystallographic Symmetry ◽  
Initial Crystal

Abstract The connection between austenite/cementite orientation relationships and crystal structure of both phases has been established. The nucleus formation mechanism at the mutual transformation of austenite and cementite structures has been proposed. Mechanism is based on the interpretation of the considered structures as crystallographic tiling onto triangulated polyhedra, and the said tiling can be transformed by diagonal flipping in a rhombus consisting of two adjacent triangular faces. The sequence of diagonal flipping in the fragment of the initial crystal determines the orientation of the fragment of the final crystal relative to the initial crystal. In case of the mutual austenite/cementite transformation the mutual orientation of the initial and final fragments is coinciding to the experimentally observed in steels Thomson-Howell orientation relationships: ${\left\{ {\bar 103} \right\}_{\rm{C}}}||{\left\{ {111} \right\}_{\rm{A}}};{\rm{}} < {\kern 1pt} 010{\kern 1pt} { > _{\rm{C}}}{\rm{||}} < {\kern 1pt} 10\bar 1{\kern 1pt} { > _{\rm{A}}};\; < {\kern 1pt} 30\bar 1{\kern 1pt} { > _{\rm{C}}}\;||\,\, < {\kern 1pt} \bar 12\bar 1{\kern 1pt} { > _{\rm{A}}}{\rm{}}$ The observed orientation relationship between FCC austenite and cementite is determined by crystallographic group-subgroup relationship between transformation participants, and non-crystallographic symmetry which is determining the transformation of triangulated clusters of transformation participants.

scholarly journals Heteroepitaxy Crystallography in Low Dimensional Nanostructures

2011 ◽  
Vol 172-174 ◽  
pp. 1307-1312 ◽  
Author(s):  
Dong Qiu ◽  
Ming Xing Zhang ◽  
Patrick Kelly
Keyword(s):  
Orientation Relationship ◽  
Growth Mode ◽  
Heteroepitaxial Growth ◽  
Substrate Orientation ◽  
Edge Matching ◽  
Interface Orientation ◽  
Self Assembled ◽  
Low Dimensional ◽  
Natural Preference

Low dimensional nanostructures, e.g. nanowires, self-assembled through heteroepitaxy, present a variety of crystallographic features that do not always follow conventional V-W or S-K growth mode. Applying Δg parallelism rules and edge-to-edge matching (E2EM) model in β-DySi2/Si and CoSi2/Si systems provides a better understanding of the natural preference of the interface orientation and the orientation relationship (OR) during heteroepitaxial growth. This may help improving the quality of nanowires through optimizing the substrate orientation.

Formation Mechanism for the Orientation Relationship between {110}〈001〉 and {111}〈112〉 Grains during Twinning in Fe-3 Pct Si Alloy

2008 ◽  
Vol 39 (10) ◽  
pp. 2278-2280 ◽  
Author(s):  
G.M. Rusakov ◽  
A.A. Redikultsev ◽  
M.L. Lobanov
Keyword(s):  
Orientation Relationship ◽  
Formation Mechanism

The coprecipitation of Cr3P and Cr in Cu

1988 ◽  
Vol 46 ◽  
pp. 764-765
Author(s):  
M.J. Witcomb ◽  
U. Dahmen ◽  
K.H. Westmacott
Keyword(s):  
Orientation Relationship ◽  
Interface Structure ◽  
Model System ◽  
Relative Orientation ◽  
Age Hardening ◽  
Precipitation Behavior ◽  
Solution Treated ◽  
Small Needle ◽  
Diffraction Patterns ◽  
Interface Structures

Cu-Cr age-hardening alloys are of interest as a model system for the investigation of fcc/bcc interface structures. Several past studies have investigated the morphology and interface structure of Cr precipitates in a Cu matrix (1-3) and good success has been achieved in understanding the crystallography and strain contrast of small needle-shaped precipitates. The present study investigates the effect of small amounts of phosphorous on the precipitation behavior of Cu-Cr alloys.The same Cu-0.3% Cr alloy as was used in earlier work was rolled to a thickness of 150 μm, solution treated in vacuum at 1050°C for 1h followed by quenching and annealing for various times at 820 and 863°C.Two laths and their corresponding diffraction patterns in an alloy aged 2h at 820°C are shown in correct relative orientation in Fig. 1. To within the limit of accuracy of the diffraction patterns the orientation relationship was that of Kurdjumov-Sachs (KS), i.e. parallel close-packed planes and directions.

Author response for "Characteristics and formation mechanism of the fractures in Archaean buried hill: A case study in the BZ19 ‐6 Block, Bohai Bay Basin, China"

2020 ◽  
Author(s):  
Xiaojuan Dai ◽  
Huafeng Tang ◽  
Huiyong Li ◽  
Yan Zhang ◽  
Peng Xu ◽  
...  
Keyword(s):  
Formation Mechanism ◽  
Author Response ◽  
Bohai Bay ◽  
Bohai Bay Basin ◽  
Buried Hill

Study of nanoalloys formation mechanism from single-source precursors [M(NH3)5Cl](ReO4)2, M = Rh, Ir

2007 ◽  
Vol 2007 (suppl_26) ◽  
pp. 283-288 ◽  
Author(s):  
E. Yu. Filatov ◽  
Yu. V. Shubin ◽  
S. V. Korenev
Keyword(s):  
Formation Mechanism ◽  
Single Source ◽  
Single Source Precursors
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