کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7970633 | 1514388 | 2015 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microstructural evolution and the variation of tensile behavior after aging heat treatment of precipitation hardened martensitic steel
ترجمه فارسی عنوان
تکامل میکرو سازگار و تنوع رفتار کششی پس از درمان حرارت پیری فولاد مارنزیتی سخت شده باران
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
چکیده انگلیسی
The effects of aging temperature on the microstructural evolution and the tensile behavior of precipitation hardened martensitic steel were investigated. Microscopic analysis using transmission electron microscope (TEM) was combined with the microstructural analysis using the synchrotron X-ray diffraction (XRD) to characterize the microstructural evolution with aging temperature. Peak hardness was obtained by precipitation of the Ni3Al ordered phase. After aging at temperature range from 420 to 590 °C, spherical Ni3Al precipitates and ellipsoidal M23C6 carbides were observed within laths and at lath boundaries, respectively. Strain hardening behavior was analyzed with Ludwik equation. It is observed that the plastic strain regimes can be divided into two different stages by a rapid increase in strain hardening followed by a comparatively lower increase. At the first strain hardening stage, the aged specimen exhibited higher strain hardening exponent than the as-quenched specimen, and the exponent in the aged specimen was not changed considerably with increasing aging temperature. It is revealed that the strain hardening exponents at the first and the second stages were associated with the Ni3Al precipitates and the domain size representing the coherent scattering area, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Characterization - Volume 99, January 2015, Pages 230-237
Journal: Materials Characterization - Volume 99, January 2015, Pages 230-237
نویسندگان
Jong-Ho Shin, JaeSuk Jeong, Jong-Wook Lee,