High strength W/TiNi micro-laminated composite with transformation-mediated ductility

Journal Article · Mon Jun 06 00:00:00 EDT 2016 · Materials & Design

DOI:https://doi.org/10.1016/j.matdes.2016.06.013· OSTI ID:1365815

Shao, Yang  ^[1]; Yu, Kaiyuan ^[1]; Jiang, Daqiang ^[1]; Yu, Cun ^[1]; Ren, Yang ^[2]; Jiang, Xiaohua ^[1]; Guo, Fangmin ^[1]; Cui, Lishan ^[1]

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1. China Univ. of Petroleum, Beijing (China)
2. Argonne National Lab. (ANL), Argonne, IL (United States)

A laminated W/TiNi composite is fabricated by hot pressing under vacuum and subsequent forging. The W and TiNi constituents are about 250 μm and 80 μm respectively in thicknesses and their interfaces are chemically sharp with negligible intermixing. The material exhibits two yielding plateaus and excellent strength-ductility combination during compression tests. In situ X-ray technique is employed to demonstrate that the unusual yielding phenomenon is related to the reversible thermoelastic phase transformation of TiNi layers. Furthermore, such mechanisms also contribute to the damage tolerance of the materials by inhibiting crack propagation in W.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22), Scientific User Facilities Division; National Natural Science Foundation of China (NSFC); National Basic Research Program of China
• Grant/Contract Number: AC02-06CH11357
• OSTI ID: 1365815
• Journal Information: Materials & Design, Vol. 106, Issue C; ISSN 0264-1275
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
laminated composites
TiNi alloy
W
transformation induced plasticity