氫對TA15鈦合金微觀組織的影響
發(fā)布人：上海艾荔艾合金股份有限公司www.shailiai.cn
更新時間：2016-01-08
采用光學顯微鏡、掃描電鏡和透射電鏡對不同氫含量TA15鈦合金的微觀組織進行觀察，研究氫元素對其微觀組織的影響。
氫對TA15鈦合金微觀組織的影響Influence of hydrogen on microstructure of TA15 titanium alloy采用光學顯微鏡、掃描電鏡和透射電鏡對不同氫含量TA15鈦合金的微觀組織進行觀察，研究氫元素對其微觀組織的影響。結果表明：氫是β相穩(wěn)定元素，隨著氫含量的增加，TA15組織中殘留β相的含量隨之增加；氫的存在能夠促進TA15鈦合金中孿晶的生長，隨著氫含量的增加，孿晶數(shù)量隨之增大；充氫后，TA15鈦合金組織中生成氫化物，氫化物的形成方式有3種，一是以α相為基體、按α→α+δ方式析出面心立方結構的δ氫化物；二是在α相內(nèi)部析出的層片狀氫化物；三是按β→δ+α方式在β相內(nèi)部共析轉變生成的層狀交替分布的δ氫化物。
The microstructures of TA15 titanium alloy with different hydrogen contents were observed by OM, SEM and TEM. And the influence of hydrogen on the microstructure of TA15 titanium alloy was investigated. The results show that hydrogen is one of the stable element to β phase. With the increase of hydrogen content, the content of residual β phase of TA15 titanium alloy increases. Hydrogen can promote the growth of twins in TA15 titanium alloy, with the increase of hydrogen content, the numbers of twins increases. The hydrides are found in TA15 titanium alloy after hydrogen addition. There are three ways to form hydrides. One is that based on α phase, the face-centered cubic δ hydrides are separated out by means of α→α+δ. The second is that the lamellar hydrides precipitates within α phase. The third is that the lamellar δ hydrides eutectoid generates in a manner of β→δ+α within β phase.
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