Refractory High-Entropy Alloys (Preprint)

Wilks, G. B.; Chuang, C. P.; Liaw, P. K.

Refractory High-Entropy Alloys (Preprint)

Active / Technical Report | Accession Number: ADA550824 |

Abstract:

Two refractory alloys, W-Nb-Mo-Ta and W-Nb-Mo-Ta-V, with near-equiatomic compositions were produced by vacuum arc-melting. Both alloys have a single-phase body-centered cubic BCC structure. The lattice parameters a 3.2134 A for the quaternary alloy and a 3.1832 A for the quinternary alloy were determined with the use of a high-energy X-ray diffraction and the scattering vector length range from 0.7 to 20 A-1. The alloy density and Vickers microhardness were p 13.75 gcm3 and Hv 4455 MPa for the W-Nb-Mo-Ta alloy and p 12.36 gcm3 and Hv 5250 MPa for the W-Nb-Mo- Ta-V alloy. The higher microhardness was related to the finer grain structure in the quinternary alloy.

Author(s):

Senkov, O. N. ; Miracle, D. B. ; Wilks, G. B. ; Chuang, C. P. ; Liaw, P. K.

Author Organization(s):

UES INC DAYTON OH

Descriptive Note:

Journal article

Supplementary Note:

Prepared in cooperation with Air Force Research Lab., General Dynamics, Dayton, OH and Tennessee Univ. Jnl article submitted to Jnl of Alloys and Compounds.

Pagination:

0017

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:

Approved For Public Release

Distribution Statement:

Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR

Identifying Numbers

Report Number(s):

AFRL-RX-WP-TP-2011-4295

Task Number(s):

20

Project Number(s):

4347

Monitor Series:

TP-2011-4295, AFRL-RX-WP

Subject Terms

Joint Capability Areas:

JCA_5_Command and Control; JCA_5.3_Planning; JCA_1.2_Force Preparation; JCA_1_Force Support; JCA_1.2.3_Educating; JCA_8_Building Partnerships

Communities of Interest:

Air Platforms

Descriptor(s):

*REFRACTORY METAL ALLOYS, GRAIN STRUCTURES(METALLURGY), HIGH ENERGY, MICROHARDNESS, REPRINTS

Field(s)/Group(s):

Metallurgy and Metallography

Keyword(s):

STINFO(SCIENTIFIC AND TECHNICAL INFORMATION), NEAR EQUIATOMIC COMPOSITIONS, VACUUM ARC MELTING, METALLIC ALLOYS, QUINTERNARY ALLOYS, PE62102F, WUAFRL434720LM10512P

Report Date:

2011 Jul 01

Creation Date:

2011 Nov 17