کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7987654 | 1515281 | 2016 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of post-weld heat treatment on microstructure, hardness and low-temperature impact toughness of electron beam welds of NIFS-HEAT-2 and CEA-J57 heats of V-4Ti-4Cr alloy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی هسته ای و مهندسی
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چکیده انگلیسی
Bead-on-plate electron beam welding in high vacuum atmosphere was applied to the plates of NIFS-HEAT-2 and CEA-J57 heats of V-4Ti-4Cr alloy. Effect of post-weld heat treatment (PWHT) in the temperature range 673-1273Â K on the hardness, impact toughness at 77Â K and microstructure of weld metal was investigated. After PWHT at 773Â K, hardness of weld metal slightly decreases from 180Â HV100 (as-welded state) to â¼170Â HV100 while absorbed energy increases up to â¼10Â J showing ductile fracture mode. PWHT at 973Â K results in re-hardening of weld metal up to â¼180Â HV100 caused by re-precipitation of Ti-C,O,N precipitates and corresponding decreasing absorbed energy to â¼2Â J with brittle fracture mode. PWHT in-between 1073-1273Â K results in gradual recovery of hardness towards values comparable with those of base metal. Impact toughness (77 K) of weld metal after PWHT at 1073K is not recovered nether to the value in as-welded state nor to that one of base metal.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Materials and Energy - Volume 9, December 2016, Pages 436-440
Journal: Nuclear Materials and Energy - Volume 9, December 2016, Pages 436-440
نویسندگان
V. Tsisar, T. Nagasaka, M. Le Flem, O. Yeliseyeva, J. Konys, T. Muroga,