CALPHAD-aided Development of Quaternary Multi-principal Element Refractory Alloys Based on NbTiZr (Postprint)

reportActive / Technical Report | Accession Number: AD1068510 | Open PDF

Abstract:

Equilibrium phase diagrams for ten MeXNbTiZr100-X alloy systems, where Me is Al, Cr, Fe, Hf, Mo, Re, Si,Ta, V or W and X ranges from 0 to 25 at were calculated using the PanNb2018a database recently developed by CompuTherm, LLC. By the type of phases and sequence of formation, these alloy systems can be divided into two groups. The first group of quaternary alloys, containing Al, Hf, Mo, Ta, or V has a single-phase BCC region below the solidus line over the entire X range and can be considered as potential candidates for the development of single-phase high entropy alloys. The second group consists of the quaternary alloy systems in which the fourth element Cr, Fe, Re, Si or W has limited solubility in BCC NbTiZr, which leads to the formation of an additional phase below the solidus and above the solubility limit. These quaternary alloy systems can be used for the development of precipitation or dispersoid strengthened complex concentrated alloys.

Author(s):
Senkov, O N ; Payton, E J ; Wooward, C ; Zhang, C ; Zhang, F
Author Organization(s):
AFRL Materials and Manufacturing Directorate Wright Patterson Air Force Base United States
Descriptive Note:
Journal Article - Embargoed Full-Text,19 Mar 2014,30 Oct 2018
Supplementary Note:
Journal of Alloys and Compounds , 783, 01 Jan 0001, 01 Jan 0001,
Pagination:
0016

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release;

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AFRL-RX-WP-JA-2019-0089
Contract/Grant Number(s):
IN-HOUSE
Monitor Series:
AFRL-RX-WP-JA-2019-0089
 Subject Terms
Joint Capability Areas:
JCA_8_Building Partnerships
Communities of Interest:
No COI(s) Identified
Descriptor(s):
buildings and structures, military facilities, military forces (united states), military operations, governments, national governments, classification, clearances, diagrams, instructions, microstructure, phase, security, monitoring, department of defense, information operations, mechanical properties, phase diagrams, air force, air force facilities
Report Date:
2018 Dec 28
Creation Date:
2019 Mar 08