Microstructure Property Relationships in a High Strength Al-Zn-Mg-Cu-Zr Alloy

机译：高强度Al-Zn-Mg-Cu-Zr合金的显微组织性能关系

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The use of Al-Zn-Mg-Cu-Zr base AA 7055 / AA 7449 extrusions and plates for strengthrncritical aerospace applications is known. The present work examines the microstructurernand properties of an AA 7449 alloy in the form of sheet. It is shown that selection ofrnsuitable alloy chemistry and heat treatments gives rise to a combination of high strengthrnand stress corrosion cracking (SCC) resistance in such materials. Quantitative Varestraintrntest results are further presented to demonstrate that small additions of either Sc or Ag tornthe 7449 alloy greatly reduce the hot cracking susceptibility during solidification of weldsrnproduced by gas tungsten arc welding process.

机译：已知将Al-Zn-Mg-Cu-Zr基底AA 7055 / AA 7449用于强度严格的航空航天应用。本工作研究了片状AA 7449合金的显微组织和性能。结果表明，在这种材料中选择合适的合金化学和热处理会产生高强度和抗应力腐蚀开裂（SCC）的组合。进一步的定量试验结果表明，少量添加Sc或Ag会破坏7449合金，大大降低了钨极气体保护弧焊工艺产生的焊缝凝固过程中的热裂纹敏感性。

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来源
《Materials forum - aluminium alloys, their physical and mechanical properties - Volume 28 - 2004》|2004年|883-888|共6页
会议地点 Brisbane(AU)
作者
A.K.Mukhopadhyay; G.M.Reddy; K.S.Prasad; V.K.Varma; C.Mondal;
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作者单位

Defence Metallurgical Research Laboratory, Kanchanbagh, Hyderabad-500 058, India;

Defence Metallurgical Research Laboratory, Kanchanbagh, Hyderabad-500 058, India;

Defence Metallurgical Research Laboratory, Kanchanbagh, Hyderabad-500 058, India;

Defence Metallurgical Research Laboratory, Kanchanbagh, Hyderabad-500 058, India;

Defence Metallurgical Research Laboratory, Kanchanbagh, Hyderabad-500 058, India;

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原文格式 PDF
正文语种 eng
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关键词
Al alloy 7449; Heat treatment; Precipitation; Tensile properties; Stress corrosion crackingrnresistance; Sc and Ag additions; Weldability;

机译：铝合金7449;热处理;沉淀;拉伸性能；应力腐蚀抗裂性； Sc和Ag的添加；焊接性;

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Microstructure Property Relationships in a High Strength Al-Zn-Mg-Cu-Zr Alloy

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