Sc,Zr复合添加对闭孔泡沫铝力学性能的影响  

Effect of Sc and Zr addition on mechanical properties of cellular aluminum foam

作　　者：黄粒 刘闪光 郝慧林 厉沙沙 杜旭初 陆政 HUANG Li;LIU Shanguang;HAO Huilin;LI Shasha;DU Xuchu;LU Zheng(AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China;Beijing Engineering Research Center of Advanced Aluminum Alloys and Applications,Beijing 100095,China;Innovation Center for Advanced Aluminum Alloy,Beijing 100095,China)

机构地区：[1]中国航发北京航空材料研究院,北京100095 [2]北京市先进铝合金材料及应用工程技术研究中心,北京100095 [3]先进铝合金技术创新中心,北京100095

出　　处：《材料工程》2024年第11期107-117,共11页Journal of Materials Engineering

摘　　要：采用Ca和TiH_(2)分别作为增黏剂和发泡剂,通过熔体发泡法成功制备了孔隙率(72±0.5)%的闭孔泡沫Al-0.16Sc,Al-0.21Sc和Al-0.16Sc-0.17Zr合金。研究了经等时时效处理后的泡沫合金微观组织和抗压强度。结果表明,在200~600℃之间的等时时效过程中,由于Al3Sc/Al3(Sc_(1-x)Ti_(x))的沉淀强化,泡沫Al-0.16Sc和Al-0.21Sc合金在325℃下达到峰值屈服强度(分别为21.4 MPa和26.8 MPa)。与泡沫Al-Sc不同,泡沫Al-0.16Sc-0.17Zr合金在325℃和400℃下的屈服强度分别达到23.7 MPa和24.7 MPa,相比铸态合金屈服强度分别提升100.8%和109%。添加Zr可以显著提高泡沫Al-Sc合金的强度,还可有效抑制Al_(3)Sc/Al_(3)(Sc_(1-x)Ti_(x))相粗化。Utilizing Ca and TiH_(2)as the thickening agent and blowing agent,respectively,Al-0.16Sc,Al-0.21Sc,and Al-0.16Sc-0.17Zr cellular foams with porosity of(72±0.5)%were successfully fabricated by the melt-foaming method.The microstructure and compressive strength of the foams with isochronal aging treatment were investigated.The results show that during isochronal aging between 200℃and 600℃,Al-0.16Sc and Al-0.21Sc foams achieve their peak yield strengths(about 21.4 MPa and 26.8 MPa,respectively)at 325℃due to the precipitation strengthening of Al3Sc/Al_(3)(Sc_(1-x)Ti_(x)).Unlike the Al-Sc foam,the yield strength of the Al-0.16Sc-0.17Zr alloy foam reaches 23.7 MPa at 325℃and 24.7 MPa at 400℃,representing an increase of 100.8%and 109%than those of the cast alloy,respectively.Zr addition not only significantly enhances the strength of the Al-Sc foams,but also effectively affects the coarsening of the Al_(3)Sc/Al_(3)(Sc_(1-x)Ti_(x))precipitate.

关 键 词：闭孔泡沫铝合金 析出相 时效处理 电阻 压缩强度 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG166.3[金属学及工艺—金属材料]