Al-Zr-Y合金的時(shí)效析出機(jī)制和性能
發(fā)布人：上海艾荔艾合金股份有限公司www.shailiai.cn
更新時(shí)間：2016-03-04
采用透射電鏡、掃描電鏡、三維原子探針等手段研究Al-Zr-Y合金的時(shí)效析出行為及Y含量對合金性能的影響規(guī)律。
Al-Zr-Y合金的時(shí)效析出機(jī)制和性能Precipitation mechanism and property of Al-Zr-Y alloy采用透射電鏡、掃描電鏡、三維原子探針等手段研究Al-Zr-Y合金的時(shí)效析出行為及Y含量對合金性能的影響規(guī)律。結(jié)果表明：Al-Zr-Y合金時(shí)效初期首先析出Al3Y相，可能成為Al3Zr時(shí)效析出的異質(zhì)核心；長時(shí)間時(shí)效后，Y有向析出相和基體界面處偏聚的傾向，最終形成無核殼結(jié)構(gòu)的Al3(Zr,Y)復(fù)合析出相；在三元Al-Zr-Y合金中，由于Zr的存在，Y在α(Al)中的平衡固溶度大幅度下降，600 ℃下的平衡固溶度從0.13%(質(zhì)量分?jǐn)?shù))降至0.03%。Y含量較高的Al-0.30Zr-0.08Y在凝固及冷卻過程中，過飽和的Y轉(zhuǎn)變?yōu)檠鼐Ы绶植嫉腁l3Y共晶和晶內(nèi)一次析出微米級Al3Y顆粒，使鋁基體中的有效Y含量較Al-0.30Zr-0.03Y中的降低4倍。Al-0.30Zr-0.03Y合金在時(shí)效過程中表現(xiàn)出更高的形核密度、更小的析出相尺寸和更優(yōu)的抗粗化能力，合金的抗再結(jié)晶溫度達(dá)到500 ℃，比Al-0.3Zr和Al-0.30Zr-0.08Y合金的抗再結(jié)晶溫度分別高出125和75 ℃。
The aging process of Al-Zr-Y and the effect of Y on the properties of alloy were studied by transmission electron microscopy, scanning electron microscopy and three dimensional atom probe. The results show that,the Al3Y precipitates form as the heterogeneous core at early aging stage of Al-Zr-Y alloy, which accelerates the diffusion and precipitation of Zr, Y has the tendency to cluster in the precipitate and matrix interface after long-time aging. Finally, Al3(Zr,Y) composite precipitates without core-shell structure forms in the alloy. The solubility of Y inα(Al) decreases from 0.13% to 0.03% (mass fraction) after aging at 600 ℃ for 50 h because of Zr. During solidification of Al-0.3Zr-0.08Y, supersaturated Y produces eutectic Al3Y along the grain boundaries and micron level Al3Yin the grain, which makes the content of Y in the matrix is 4 times lower than that of Al-0.30Zr-0.03Y. Al-0.30Zr-0.03Y shows higher nucleation density, smaller precipitate radius and slower coarsening rate. The recrystallization temperature of Al-0.30Zr-0.03Y reaches 500 ℃, which is 125 and 75 ℃ higher than those of Al-0.3Zr and Al-0.3Zr-0.08Y, respectively.
作為值得信賴的合作伙伴和高品質(zhì)金屬合金的半成品供應(yīng)商，艾荔艾擁有完善的服務(wù)體系和專業(yè)的團(tuán)隊(duì)。在同客戶交易的過程中，我們力求根據(jù)不同的應(yīng)用需求將我們的產(chǎn)品做到精益求精。針對當(dāng)前和未來的市場需求，艾荔艾致力于為客戶提供最佳的金屬材料解決方案。
AILIAI has been a reliable partner and supplier of sophisticated and high-quality semi-finished products maed of alloys. In dialogue with our customers, we optimise our products to meet the specific application requirements. AILIAI develops the best alloy material solutions for current and future challenges.
獲取更多我們供應(yīng)的合金和服務(wù)信息，請致電086-021-67660801或發(fā)電子郵件kefu@ailiaigroup.com聯(lián)系我們，您也可以通過微博，微信，領(lǐng)英和推特與我們互動。
For more information on the alloys and services that we supply,?call us?at 086-021-67660801 or email us at kefu@ailiaigroup.com. You can also get in touch on social media, we are constantly active on?Weibo,?Weixin,?LinkedIn?and?Twitter.