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دانلود رایگان مقاله آی اس آی درخواستی( Free DOWNLOAD ISI Papers )،بانک و مرجع مقالات علمی و تخصصی، پروژه، دریافت و دانلود رایگان+مجلات و نشریات آی اس آی - A characterization of microstructure and microhardness on longitudinal planes of an Al–Mg–Si alloy processed by ECAP
 
دانلود رایگان مقاله آی اس آی درخواستی( Free DOWNLOAD ISI Papers )،بانک و مرجع مقالات علمی و تخصصی، پروژه، دریافت و دانلود رایگان+مجلات و نشریات آی اس آی
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Abstract

An AA6005 Al–Mg–Si alloy was used to investigate the evolution of microhardness and microstructure on the longitudinal or Z planes after processing by ECAP where these planes lie parallel to the upper and lower surfaces of the billet. The processing was conducted at a temperature of 423 K using an ECAP die with a channel angle of 90°. Samples were pressed for up to 8 passes and observations were undertaken on the top and bottom planes and on a parallel plane located at approximately the center of the billet. The results show that the grain size is reduced from ~ 50 μm in the initial condition to ~ 200 nm after 8 passes with similar grain sizes recorded on all three planes of observation. Measurements of the microhardness show the values increase by a little more than two times after 8 passes. The results from this investigation demonstrate that excellent microstructural homogeneity may be achieved throughout the Al–Mg–Si billet after processing through a total of 8 passes.

Keywords

  • Al–Mg–Si alloy;
  • Equal-channel angular pressing;
  • Hardness;
  • Homogeneity;
  • Ultrafine grains
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نوع مطلب : درباره مقالات ISI، درباره مقالات انگلیسی، مقالات انگلیسی، مقالات ISI، 
برچسب ها : Abstract An AA6005 Al–Mg–Si alloy was used to investigate the evolution of microhardness and microstructure on the longitudinal or Z planes after processing by ECAP where these planes lie parallel to the upper and lower surfaces of the billet. The processing was conducted at a temperature of 423 K using an ECAP die with a channel angle of 90°. Samples were pressed for up to 8 passes and observations were undertaken on the top and bottom planes and on a parallel plane located at approximately the center of the billet. The results show that the grain size is reduced from ~ 50 μm in the initial condition to ~ 200 nm after 8 passes with similar grain sizes recorded on all three planes of observation. Measurements of the microhardness show the values increase by a little more than two times after 8 passes. The results from this investigation demonstrate that excellent microstructural homogeneity may be achieved throughout the Al–Mg–Si billet after processing through a total of 8 passes. Keywords Al–Mg–Si alloy; Equal-channel angular pressing; Hardness; Homogeneity; Ultrafine grains،
لینک های مرتبط :
 
لبخندناراحتچشمک
نیشخندبغلسوال
قلبخجالتزبان
ماچتعجبعصبانی
عینکشیطانگریه
خندهقهقههخداحافظ
سبزقهرهورا
دستگلتفکر


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