Microstructure evolution and coercivity mechanism of hydrogenation-disproportionation-desorption-recombination (HDDR) treated Nd-Fe-B strip cast alloys

2021 ◽  
Author(s):  
Bin Ma ◽  
Xiaoqian Bao ◽  
Aizhi Sun ◽  
Jiheng Li ◽  
Xuexu Gao
Keyword(s):  
Microstructure Evolution ◽  
Cast Alloys ◽  
Strip Cast ◽  
Coercivity Mechanism

scholarly journals Magnetic Properties of Anisotropic Nd-Fe-B HDDR Powders Prepared from Strip Cast Alloys.

2002 ◽  
Vol 49 (12) ◽  
pp. 1094-1097
Author(s):  
Koichiro Morimoto ◽  
Kenichi Kato ◽  
Kazunori Igarashi ◽  
Ryoji Nakayama
Keyword(s):  
Magnetic Properties ◽  
Cast Alloys ◽  
Strip Cast

Normal and Abnormal Grain Growth in Hydrogenation-Disproportionation-Desorption-Recombination Processed Nd–Fe–B Strip-Cast Alloys

2020 ◽  
Vol 20 (5) ◽  
pp. 3119-3130 ◽  
Author(s):  
Bin Ma ◽  
Xiaoqian Bao ◽  
Aizhi Sun ◽  
Jiheng Li ◽  
Shuai Cao ◽  
...  
Keyword(s):  
Grain Growth ◽  
Abnormal Grain Growth ◽  
Cast Alloys ◽  
Strip Cast

scholarly journals Microstructural Evaluation of Nd-Fe-B Strip Cast Alloys

2009 ◽  
Vol 50 (3) ◽  
pp. 479-482 ◽  
Author(s):  
Takashi Hattori ◽  
Nana Fukamachi ◽  
Ryota Goto ◽  
Nobuki Tezuka ◽  
Satoshi Sugimoto
Keyword(s):  
Microstructural Evaluation ◽  
Cast Alloys ◽  
Strip Cast

TEM study of the early stages of the precipitation process in strip-cast Al3003 alloys

1992 ◽  
Vol 7 (12) ◽  
pp. 3235-3241 ◽  
Author(s):  
Y.F. Cheng ◽  
V. Hansen ◽  
J. Gj⊘nnes ◽  
L. Reine Wallenberg
Keyword(s):  
Quasicrystalline Phase ◽  
Precipitation Process ◽  
Precipitation Behavior ◽  
Secondary Particles ◽  
Transmission Electron ◽  
Cast Alloys ◽  
Strip Cast ◽  
Icosahedral Quasicrystalline Phase ◽  
Si Content ◽  
Icosahedral Quasicrystalline

The precipitation behavior, especially the early nucleation stages, of the industrial strip-cast Al3003 alloys was investigated by using transmission electron microscopy (TEM). An icosahedral quasicrystalline phase was found as secondary particles in these strip-cast alloys after heat treatment for a few seconds. Three different nucleation paths are proposed based on the TEM observations. They have the same origin, viz. (Mn, Fe)-containing Mackay icosahedra, and are governed by the composition of alloys, especially the Mn and Si content.

Microstructure Evolution during Fabrication of Ni-Ti-Nb SMA Wires

2014 ◽  
Vol 775-776 ◽  
pp. 534-537 ◽  
Author(s):  
João Pedro Tosetti ◽  
Gilberto Alvares da Silva ◽  
Jorge Otubo
Keyword(s):  
Microstructure Evolution ◽  
Eutectic Phase ◽  
Matrix Phase ◽  
Dispersed Particles ◽  
Nb Content ◽  
Cast Alloys ◽  
Cold Worked ◽  
Ductile Behavior ◽  
Wire Fabrication ◽  
Niti Matrix

Ni-Ti-Nb system alloys show wide shape memory hysteresis, suitable for assembly applications. The microstructure is composed by NiTi matrix (with some dissolved Nb) and Nb dispersed particles (with some Ni and Ti content). These particles are to cause the hysteresis widening. This work evaluates the microstructure evolution during wire fabrication process of equiatomic Ni and Ti alloys with increasing Nb content (1.5, 3.0, 6.0 and 9,0%at.). It is shown that as-cast alloys with up to 9% at.Nb and near equiatomic Ni:Ti relation show three main microconstituents: NiTi matrix phase, interdendritic eutectic phase (NiTi + β-Nb) and Ti3(Ni,Nb)2 compound precipitates. It was observed that NiTi matrix phase and eutectic phase (NiTi + β-Nb) have ductile behavior while Ti3(Ni,Nb)2 compound have fragile behavior. There was not much hardness variation during hot swaging (200-300 HV) due to recovery and recrystallization processes. Mechanical hardening prevailed as the mechanism for increase hardness of cold worked samples from 200 to 450 HV.

Texture and microstructure evolution during different rolling methods in strip-cast grain-oriented 6.5% Si steel

2020 ◽  
Vol 499 ◽  
pp. 166256 ◽  
Author(s):  
Yuanxiang Zhang ◽  
Xiang Lu ◽  
Guo Yuan ◽  
Yang Wang ◽  
Feng Fang ◽  
...  
Keyword(s):  
Microstructure Evolution ◽  
Strip Cast

Microstructure Evolution and Mechanical Anisotropy of Strip Cast and Direct Chill Cast AA5182 Aluminum Alloy

2002 ◽  
Vol 396-402 ◽  
pp. 101-106 ◽  
Author(s):  
X.F. Yu ◽  
Tong Guang Zhai ◽  
X.M. Cheng ◽  
X.Y. Wen ◽  
Jiantao Liu ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Microstructure Evolution ◽  
Direct Chill ◽  
Mechanical Anisotropy ◽  
Strip Cast ◽  
Chill Cast ◽  
Direct Chill Cast
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