預變形對超高強鋁合金擠壓材組織性能的影響
發布人：上海艾荔艾合金股份有限公司www.shailiai.cn
更新時間：2016-04-01
采用硬度與電導率測試、拉伸試驗、晶間腐蝕和剝落腐蝕試驗以及X射線衍射(XRD)、掃描電鏡(SEM)、電子背散射衍射(EBSD)分析等方法研究預變形對Al-12.45Zn-3.56Mg-1.12Cu-0.21Zr-0.0553Sr鋁合金擠壓材組織與性能的影響。
預變形對超高強鋁合金擠壓材組織性能的影響Effect of pre-deformation on microstructure and properties of ultra-high strength aluminum alloy extrusion materials采用硬度與電導率測試、拉伸試驗、晶間腐蝕和剝落腐蝕試驗以及X射線衍射(XRD)、掃描電鏡(SEM)、電子背散射衍射(EBSD)分析等方法研究預變形對Al-12.45Zn-3.56Mg-1.12Cu-0.21Zr-0.0553Sr鋁合金擠壓材組織與性能的影響。結果表明：該合金在(121 ℃, 24 h)時效制度下，預變形處理能有效引入位錯，位錯密度從0.197×10-14 m-2提高到1.156×10-14 m-2；同時，由于位錯對強度的貢獻高達58.7 MPa。根據EBSD分析，經預變形處理后，合金的低角度晶界所占比例為66.2%，比未經預變形處理的合金提高12.6%，平均晶界角度值降低3.894°，平均晶粒尺寸增長6.396 mm。預變形能夠明顯提高合金的抗晶間腐蝕性能(最大晶間腐蝕深度由222.1 mm降低至165 mm)，對剝落腐蝕性能的影響不明顯。
The effects of pre-deformation on microstructure and properties of Al-12.45Zn-3.56Mg-1.12Cu-0.21Zr- 0.0553Sr ultra-high strength aluminum alloy extrusion materials were studied by means of micro-hardness tester and electrical conductivity test, tensile test, intergranular and exfoliation corrosion experiment, X-ray diffraction (XRD), scanning electron microscopy (SEM) and electron back-scattered diffraction (EBSD) analysis. The results show that in the aging system at 121 ℃ for 24 h, the pre-deformation can effectively introduce dislocations,the dislocation density increases from 0.197×10-14 m-2to 1.156×10-14 m-2, and the strength reaches up to 58.7 MPa because of the dislocation contribution.Based on EBSD analysis, after pre-deformation treatment, the low angle grain boundary proportion (66.2%) of the pre-deformation alloy increases by 12.6% than that of the underformed alloy, the mean misorientation value reduces 3.894°, and the average grain size increases by 6.396 μm. The pre-deformation treatment can significantly improve the intergranular corrosion resistance properties (the maximum intergranular corrosion depth reducing from 222.1 μm to 165 μm), but little improvement on exfoliation corrosion performance.
作為值得信賴的合作伙伴和高品質金屬合金的半成品供應商，艾荔艾擁有完善的服務體系和專業的團隊。在同客戶交易的過程中，我們力求根據不同的應用需求將我們的產品做到精益求精。針對當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.
獲取更多我們供應的合金和服務信息，請致電086-021-67660801或發電子郵件kefu@ailiaigroup.com聯系我們，您也可以通過微博，微信，領英，XING，臉書和推特與我們互動。
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,?XING, Facebook?and?Twitter.