首页|The effects of α″ and ω phases on the superelasticity and shape memory effect of binary Ti-Mo alloys
The effects of α″ and ω phases on the superelasticity and shape memory effect of binary Ti-Mo alloys
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NSTL
Elsevier
<![CDATA[<ce:abstract xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns="http://www.elsevier.com/xml/ja/dtd" xml:lang="en" id="abs0010" view="all" class="author"> <ce:section-title id="sectitle0010">Abstract</ce:section-title> <ce:abstract-sec id="abssec0010" view="all"> <ce:simple-para id="abspara0010" view="all">The superelasticity and shape memory effect of binary water-quenched and air-cooled Ti-10, 11, and 12 Mo (wt%) alloys are evaluated by tensile tests and linear dilatometry measurements. In addition to β phase, the water-quenched alloys consist of α″ and ω phases, while the air-cooled alloys contain a large amount of ω phase. The amounts of α″ and ω phases decrease with the increasing Mo content. After 3% pre-strain, the water-quenched Ti-12Mo alloy exhibits highest superelastic recovery strain of about 0.7%. Subsequent heating gives rise to obvious shape memory recoveries in the water-quenched Ti-11Mo and 12Mo alloys at 700?K. A total recovery strain of about 1% and a total recovery ratio of around 33% are obtained in the water-quenched Ti-11Mo and 12Mo alloys. Lower room temperature superelasticity and shape memory effect are present in the air-cooled alloys due to the decreased transformation temperatures compared with water-quenched alloys. The re-orientation of α″ martensite occurred in the water-quenched alloys and the stress-induced α″ martensitic transformation occurred in both the water-quenched and air-cooled alloys. The formation of ω phase is detrimental to the re-orientation of α″ martensite and the stress-induced α″ martensitic transformation, resulting in higher superelasticity when the Mo content increases.</ce:simple-para> </ce:abstract-sec> </ce:abstract><ce:abstract xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns="http://www.elsevier.com/xml/ja/dtd" class="graphical" id="abs0015" view="all"> <ce:section-title id="sectitle0015">Graphical abstract</ce:section-title> <ce:abstract-sec id="abssec0015" view="all"> <ce:simple-para id="abspara0015" view="all"/> <ce:simple-para>Display Omitted</ce:simple-para> </ce:abstract-sec> </ce:abstract><ce:abstract xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns="http://www.elsevier.com/xml/ja/dtd" class="author-highlights" xml:lang="en" id="abs0020" view="all"> <ce:section-title id="sectitle0020">Highlights</ce:section-title> <ce:abstract-sec id="abssec0020" view="all"> <ce:simple-para id="abspara0020" view="all"> <ce:list id="ulist0010"> <ce:list-item id="u0010"> <ce:label>?</ce:label> <ce:para id="p0010" view="all">The water-quenched Ti-Mo alloys contain different amount of α″ and ω phases.</ce:para> </ce:list-item> <ce:list-item id="u0015"> <ce:label>?</ce:label> <ce:para id="p0015" view="all">A highest superelasticity of 0.7% is attained in the water-quenched Ti-12Mo alloy.</ce:para> </ce:list-item> <ce:list-item id="u0020"> <ce:label>?</ce:label> <ce:para id="p0020" view="all">The Ti-Mo alloys show limited shape memory effect due to the formation of ω phase.</ce:para> </ce:list-item> </ce:list> </ce:simple-para> </ce:abstract-sec> </ce:abstract>]]>
Metals and alloysShape memoryPhase transitionsTransmission electron microscopy
State Key Laboratory of Advanced Special Steel and Shanghai Key Laboratory of Advanced Ferrometallurgy and School of Materials Science and Engineering, Shanghai University
Laboratory for Microstructures, Shanghai University
Institute of Materials Science, Shanghai University
NSTL
Elsevier
