کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1621448 | 1005747 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Grain growth in Ni-Mn-Ga alloys
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The influence of annealing temperature and time on grain growth in polycrystalline Ni-Mn-Ga samples near the stoichiometric composition Ni2MnGa was investigated. Grain growth was only observed for compositions with a Ni-content below 50Â at.%. The existence of constitutional vacancies as a possible origin for the different grain growth behavior was excluded by positron annihilation spectroscopy (PAS). In order to activate grain boundary motion and hence grain growth in Ni50Mn29Ga21 the samples were annealed and deformed in situ in compression up to various strain levels. A sharp threshold to initiate grain growth is observed between 8% and 10% of compressive strain.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 488, Issue 1, 20 November 2009, Pages 420-424
Journal: Journal of Alloys and Compounds - Volume 488, Issue 1, 20 November 2009, Pages 420-424
نویسندگان
Franziska Thoss, Martin Pötschke, Uwe Gaitzsch, Jens Freudenberger, Wolfgang Anwand, Stefan Roth, Bernd Rellinghaus, Ludwig Schultz,