Dendrite size and tensile ductility in Ti-based amorphous alloys containing ductile dendrites

被引：6

作者：

Jeon, Changwoo ^{[1
]}

Kim, Choongnyun Paul ^{[1
]}

Kim, Hyoung Seop ^{[1
]}

Lee, Sunghak ^{[1
]}

机构：

[1] Pohang Univ Sci & Technol, Ctr Adv Aerosp Mat, Pohang 790784, South Korea

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2013年 / 587卷

基金：

新加坡国家研究基金会;

关键词：

Ti-based amorphous alloy; Dendrite; Tensile ductility; Deformation band; Shear band; BULK-METALLIC-GLASS; MATRIX COMPOSITES; MECHANICAL-PROPERTIES; PURE TITANIUM; DEFORMATION; MICROSTRUCTURE; BEHAVIOR; PHASE; ZIRCONIUM; FRACTURE;

D O I：

10.1016/j.msea.2013.08.062

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Three Ti-based amorphous alloy sheets containing ductile dendrites were fabricated by varying cooling rate, and deformation mechanisms related with improvement of tensile ductility were investigated by observing initiation and propagation processes of deformation bands at dendrites. The alloy sheets contained many dendrites (volume fraction; 64 similar to 68%, size: 2.1-9.4 mu m), and showed the yield strength of 1.5 GPa and the elongation up to 5%. According to the observation of tensile deformation behavior of the 3-mm-thick alloy sheet, many deformation bands were formed inside dendrites in several directions, and deformation bands met crossly each other to form widely deformed areas. Since the wide and homogeneous deformation in this alloy sheet beneficially worked for the tensile strength and ductility simultaneously, the optimum size of dendrites and thickness of the alloy sheets were about 3.1 mu m and 3 mm, respectively. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：143 / 149

页数：7

共 28 条

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