Bonding Theory for Metals &amp; Alloys

Wang, Frederick E.

doi:10.1016/b978-044451978-8/50003-9

Cited by 25 publications

(23 citation statements)

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“…17 The bonding characteristics under twinning shear can be investigated in terms of the valence charge density along a path p-q-r as shown in Figs. Electronic configuration of Ni and Ti is ͑Ar͒3d 8 4s 2 and ͑Ar͒3d 2 4s 2 , respectively.…”

Section: Type II Detwinning In Nitimentioning

confidence: 99%

Type II detwinning in NiTi

Ezaz

Şehitoğlu

2011

Applied Physics Letters

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Section: Type II Detwinning In Nitimentioning

confidence: 99%

Type II detwinning in NiTi

Ezaz

Şehitoğlu

2011

Applied Physics Letters

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“…[57] Correspondingly, the atomic radius can be covalent radius, ionic radius, and metallic radius. [47] Based on the bonding theory for metals and alloys assumption in Ref 57, covalent bond and metallic bond coexist in metals and alloys, no metal or alloy can be 100% metallic bond or 100% covalent bond.…”

Section: The Source Of the Atomic Sizementioning

confidence: 99%

Evaluation of Calphad Approach and Empirical Rules on the Phase Stability of Multi-principal Element Alloys

Liang

Schmid–Fetzer

2017

J. Phase Equilib. Diffus.

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The formation of single disordered solid solution phase in multi-principal element alloys (MPEAs) is crucial for the properties of the alloy, and thus several empirical rules have been proposed to predict the stability of disordered solid solution phase in MPEAs. Compared to these empirical rules, Calphad approach provides a more reliable and quantitative prediction. In the present work, we choose three model systems of Al x CoCrFeNi, CoCr x FeMnNi and Al x LiMgSnZn to evaluate these empirical rules by comparing with the Calphad calculated results. The Calphad calculated temperature-composition sections reveal the effect of composition on the phase formation under equilibrium condition. Corresponding diagrams along these sections illustrate parameter variations from empirical rules associated with alloy compositions and highlight predictions and limitations. The impact of the different sources of atomic size data is also discussed.

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“…The difference in electronegativity among the elements (∆e) in each particular composition is assumed to be related to the formation enthalpy (∆H) and glass stability of the corresponding alloy [5][6][7] . Electronegativity describes the relativity ability of an atom to attract atoms in a chemical bond and can indicate the percentage of covalent bonding in the alloy 10 .…”

Section: Introductionmentioning

confidence: 99%

New Zr-based glass-forming alloys containing Gd and Sm

et al. 2012

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The effect of minor additions of Gd and Sm on the glass-forming ability (GFA) of Cu-Zr-Al alloys is investigated here. The rationale for these additions is the fact that the atomic size distribution can increase GFA by changing the topology of the alloy as a function of cluster stability, which is tied to the electronegativity and ionic and covalent nature of alloys. Ingots with nominal compositions of Cu 40 Zr 49 Al 10.5 Gd 0.5 , Cu 40 Zr 49 Al 10.5 Sm 0.5 and Cu 39 Zr 50 Al 9 Gd 2 were prepared by arc-melting and rapidly quenched ribbons were produced by the melt-spinning technique. Bulk samples with a thickness of up to 10 mm were also produced by casting, using a wedge-shaped copper mold. The samples were characterized by differential scanning calorimetry, X-ray diffractometry and scanning electron microscopy. The three compositions showed a fully amorphous structure in the ribbons and a predominantly homogeneous amorphous structure with a thickness of up to 10 mm, although some gadolinium oxide crystals as well as samarium compounds were found to be scattered in the amorphous matrix in 5-mm-thick samples. The amorphous phases in the alloys showed high thermal stability with a supercooled liquid region (∆T x ) of about 70 K.

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Bonding Theory for Metals & Alloys

Cited by 25 publications

References 0 publications

Type II detwinning in NiTi

Type II detwinning in NiTi

Evaluation of Calphad Approach and Empirical Rules on the Phase Stability of Multi-principal Element Alloys

New Zr-based glass-forming alloys containing Gd and Sm

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