Academic Journal
Toughening ultrastrong low-density steel by textured d-ferrite lamellas.
| العنوان: | Toughening ultrastrong low-density steel by textured d-ferrite lamellas. |
|---|---|
| المؤلفون: | Bin Hu, Guosen Zhu, Guohui Shen, Zheng Wang, Qinghua Wen, Xiao Shen, Haiwen Luo |
| المصدر: | Defence Technology; Feb2024, Vol. 32, p405-411, 7p |
| مصطلحات موضوعية: | LIGHTWEIGHT steel, TENSILE strength, MARTENSITE, CRACK propagation (Fracture mechanics), ENERGY consumption |
| مستخلص: | By both the Charpy V-notched impact and the projectile tests, we here investigated the dynamic fracture behavior of a recently developed ultrastrong lightweight steel comprising a hierarchical martensitic matrix, dispersed ultra-fine-retained austenite grains and oriented d-ferrite lamellas, the latter being due to high Al and Si contents employed for low-density design. This steel shows a superior combination of specific ultimate tensile strength and impact toughness to other ultrastrong steels and has successfully arrested a real steel-cored bullet shot. These are attributed to the densely textured d-ferrite lamellas that can deflect the propagating cracks until they are trapped and enclosed besides austenite-to-martensite transformation crack closure, leading to more energy consumed before failure. These results suggest a new pathway for toughening ultrastrong lightweight steels. [ABSTRACT FROM AUTHOR] |
| Copyright of Defence Technology is the property of KeAi Communications Co. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| قاعدة البيانات: | Complementary Index |
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