کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7980374 1514730 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of severe plastic deformation at cryogenic temperature on grain refinement and softening of pure metals: Investigation using high-pressure torsion
ترجمه فارسی عنوان
تأثیر تغییر شکل پلاستیک شدید در دمای کریوژن بر پالایش دانه و نرم شدن فلزات خالص: تحقیق با استفاده از تورفتگی با فشار بالا
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
چکیده انگلیسی
Several metals were severely deformed at cryogenic temperature in liquid nitrogen and at room temperatures in air using high-pressure torsion (HPT). Extra grain refinement to the nanometer level and extra hardening were achieved after cryogenic-HPT in niobium, which has a high melting temperature. In copper, which has a moderate melting temperature, nanograins formed during cryogenic-HPT but self-annealing, i.e., abnormal softening and grain coarsening to the micrometer level, occurred within a few hours after the cryogenic-HPT. In low-melting-temperature metals such as zinc, magnesium and aluminum, cryogenic-HPT led to extra softening and/or formation of coarser grains because of enhanced static recrystallization. The effect of impurities on grain size, hardness-strain behavior and self-annealing was also studied after cryogenic-HPT.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 613, 8 September 2014, Pages 103-110
نویسندگان
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