Formation of Metastable Phases in Rapidly Quenched Binary Ti Alloys

1985 ◽  
Vol 58 ◽  
Author(s):  
S.H. Whang ◽  
C.S. Chi
Keyword(s):  
Mechanical Stress ◽  
Cooling Rate ◽  
Phase Formation ◽  
Systematic Study ◽  
Metastable Phase ◽  
Rapid Quenching ◽  
Metastable Phases ◽  
Β Phase ◽  
Ti Alloys ◽  
Metastable Phase Formation

ABSTRACTRapid quenching of binary Ti alloys from the melt results in various metastable phases. A systematic study has been conducted in order to elucidate principles associated with the formation of metastable phases in binary Ti alloys resulting from rapid quenching. These metastable phases that include α’, α” phases, metastable β phase, and w phase are discussed with regard to their occurrence and the extension of a phase as a function of cooling rate. Effect of cooling rate and mechanical stress applied during cooling on metastable phase formation was investigated.

scholarly journals Metastable Phase Formation in Be-Nb Intermetallic Compounds

1990 ◽  
Vol 213 ◽  
Author(s):  
J. L. Brimhall ◽  
L. A. Charlot ◽  
S. M. Bruemmer
Keyword(s):  
Low Temperature ◽  
Substrate Temperature ◽  
Intermetallic Compounds ◽  
Phase Formation ◽  
Metastable Phase ◽  
Metastable Phases ◽  
Crystalline Phases ◽  
Amorphous Structures ◽  
Metastable Phase Formation ◽  
Sputter Deposited

ABSTRACTAmorphous structures or metastable crystalline phases are produced in sputter deposited Be-Nb alloys (5–15 at.% Nb) depending on the substrate temperature. The metastable phases transform to the stable Be12Nb, Be17Nb2 or Be3Nb phases on annealing at temperatures >800°C. No Be5Nb phase was found and the Be17Nb2 phase is stable to low temperature. The Be12Nb phase appeared to have a stoichiometric range of about 5.5 to 7.7 at.% Nb. The formation of the metastable phases is consistent with current models and theories.

Metastable phase formation in reactively sputtered WxSiy films

1986 ◽  
Vol 4 (6) ◽  
pp. 3117-3120 ◽  
Author(s):  
J. S. Lin ◽  
R. C. Budhani ◽  
G. Pollock ◽  
C. V. Deshpandey ◽  
R. F. Bunshah
Keyword(s):  
Phase Formation ◽  
Metastable Phase ◽  
Metastable Phase Formation

scholarly journals Modeling of metastable phase formation diagrams for sputtered thin films

2016 ◽  
Vol 17 (1) ◽  
pp. 210-219 ◽  
Author(s):  
Keke Chang ◽  
Denis Music ◽  
Moritz to Baben ◽  
Dennis Lange ◽  
Hamid Bolvardi ◽  
...  
Keyword(s):  
Thin Films ◽  
Phase Formation ◽  
Metastable Phase ◽  
Metastable Phase Formation

Metastable Phase Formation in Rapidly Solidified ZrO2-Al2O3 Powders

2003 ◽  
Vol 437-438 ◽  
pp. 407-410 ◽  
Author(s):  
X. Zhou ◽  
R.K. Sadangi ◽  
Bernard H. Kear ◽  
W.R. Cannon
Keyword(s):  
Phase Formation ◽  
Metastable Phase ◽  
Metastable Phase Formation ◽  
Rapidly Solidified

Metastable phase formation during the reaction of Ni films with Si(001): The role of texture inheritance

2010 ◽  
Vol 107 (9) ◽  
pp. 093515 ◽  
Author(s):  
S. Gaudet ◽  
C. Coia ◽  
P. Desjardins ◽  
C. Lavoie
Keyword(s):  
Phase Formation ◽  
Metastable Phase ◽  
Metastable Phase Formation

Effects of Cooling Rate and Sn Addition on the Microstructure of Ti-Nb-Sn Alloys

2011 ◽  
Vol 172-174 ◽  
pp. 190-195 ◽  
Author(s):  
Giorgia T. Aleixo ◽  
Eder S.N. Lopes ◽  
Rodrigo Contieri ◽  
Alessandra Cremasco ◽  
Conrado Ramos Moreira Afonso ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Cooling Rate ◽  
Melting Furnace ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Β Phase ◽  
Arc Melting ◽  
Ti Alloys ◽  
Ω Phase

Ti-based alloys present unique properties and hence, are employed in several industrial segments. Among Ti alloys, β type alloys form one of the most versatile classes of materials in relation to processing, microstructure and mechanical properties. It is well known that heat treatment of Ti alloys plays an important role in determining their microstructure and mechanical behavior. The aim of this work is to analyze microstructure and phases formed during cooling of β Ti-Nb-Sn alloy through different cooling rates. Initially, samples of Ti-Nb-Sn system were prepared through arc melting furnace. After, they were subjected to continuous cooling experiments to evaluate conditions for obtaining metastable phases. Microstructure analysis, differential scanning calorimetry and X-ray diffraction were performed in order to evaluate phase transformations. Depending on the cooling rate and composition, α” martensite, ω phase and β phase were obtained. Elastic modulus has been found to decrease as the amount of Sn was increased.

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