于利军,郑子樵,李世晨,刘岗,魏修宇

• 1:中南大学材料科学与工程学院
• 2:中南大学材料科学与工程学院
• 3:中南大学材料科学与工程学院
• 4:中南大学材料科学与工程学院

摘要(Abstract)：

研究了热处理工艺T6I6对2195Al-Li合金组织和性能的影响,结果表明:2195Al-Li合金的断裂韧性与析出相的密度、尺寸及分布有关,而以T1相的密度、尺寸和分布影响最大;T6I6热处理工艺抑制T1相在亚晶界析出并促进T1和θ′相在晶内细小弥散析出,从而使2195合金在强度没有降低的条件下相对T6工艺提高合金塑性及断裂韧性。

关键词(KeyWords)： 2195Al-Li合金;T6I6;塑性;断裂韧性

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 于利军,郑子樵,李世晨,刘岗,魏修宇

参考文献(References)：

• [1]Pickens J R,HeuBaum F H,Langan T J,et al.Al-(4.5-6.3)Cu-1.3Li-0.4Ag-0.4Mg-0.14Zr alloy weldalite 049[C].Sanders T H,Strake E A Jr.Proceeding of the 5thInternational Aluminum-Lithium Conference.Williamsburg,Virginia:MCE Publications Ltd,1989:1397-1414.
• [2]Fielding P S,George J.Aluminum-Lithium for aerospace[J].Advanced Materials and Processes,1996,150(10):21-23.
• [3]熊焕.低温储箱及铝锂合金的应用[J].导弹与航天运载技术,2001,(6):33-41.
• [4]Lumley R N,Polmear I J,Morton A J.International Patent[P].Application PCT/AU00/01601,2002.
• [5]Lumley R N,Polmear I J,Morton A J.International Patent[P].Application PCT/AU02/00234,2002.
• [6]Lumley R N,Polmear I J,Morton A J.Interrupted aging and secondary precipitation in Aluminum alloys[J].Materials Science and Technology,2003,19(11):1483-1490.
• [7]万韬瑜.RI-ITMT中间形变热处理对2091合金强韧化的影响[D].长沙:中南大学,1989:22-23.
• [8]Kaufman J G,Hunsicker Y.Fracture toughness testing[M].New York:ALCOA Research Laboratories,1991:209-308.
• [9]Schueller R D,Wawner F E.Nucleation mechanism of the cubicσphase in squeeze-cast Aluminium matrix composites[J].Journal of Materials Science,1994,29(2):424-435.
• [10]Chen P S,Bhat B N.Time-temperature-precipitation behavior in Al-Li Alloy 2195[R].NASA/TM-2002-211548,2002.
• [11]Chen P S,Stanton W P.A new aging treatment for improving cryogenic toughness of the main structural alloy of the super lightweight tank[R].NASA/TM-1996-108524,1996.
• [12]Chen P S,Kuruvilla A K,Malone T W,et al.The effect of artificial aging on the microstructure and fracture toughness of Al-Cu-Li alloy 2195[J].Journalof Materials Engineering and Performance,1998,7(5):682-690.
• [13]Blankenship C P,Strake E A Jr.Structure-property relationships in Al-Li-Cu-Mg-Ag-Zr alloy X2095[J].Acta Metall Mater,1995,42(3):845-855.

文章评论(Comment)：