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Title: Precipitation hardening of the fully lamellar structure of investment cast Ti-47Al-2Nb-1Mn-0.5Mo-0.5W-0.2Si alloy

Abstract

This work investigates precipitation hardening of the fully lamellar structure of an investment cast Ti-47Al-2Nb-1Mn-0.5Mo-0.5W-0.2Si alloy. The as cast columnar lamellar structure, as well as the bulk B2 phase and silicides, formed during solidification, complicate the analysis. As such, a full solution treatment in the {alpha} phase field was applied to the as cast material to produce an equiaxed fully lamellar structure without the bulk B2 phase and silicides. This lamellar structure was used as the starting microstructure to investigate precipitation hardening of the fully lamellar structure. When appropriately aged to contain dispersed silicides and/or {beta} particles this structure may have favorable creep properties.

Authors:
;  [1];  [2]
  1. Carleton Univ., Ottawa, Ontario (Canada). Dept. of Mechanical and Aerospace Engineering
  2. National Research Council Canada, Ottawa, Ontario (Canada). Structures, Materials and Propulsion Lab.
Publication Date:
OSTI Identifier:
691316
Resource Type:
Journal Article
Journal Name:
Scripta Materialia
Additional Journal Information:
Journal Volume: 41; Journal Issue: 6; Other Information: PBD: 20 Aug 1999
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; MICROSTRUCTURE; HARDNESS; TITANIUM ALLOYS; ALUMINIUM ALLOYS; CHEMICAL COMPOSITION; ANNEALING; PRECIPITATION HARDENING; LAMELLAE

Citation Formats

Chen, W.R., Beddoes, J., and Zhao, L. Precipitation hardening of the fully lamellar structure of investment cast Ti-47Al-2Nb-1Mn-0.5Mo-0.5W-0.2Si alloy. United States: N. p., 1999. Web. doi:10.1016/S1359-6462(99)00203-1.
Chen, W.R., Beddoes, J., & Zhao, L. Precipitation hardening of the fully lamellar structure of investment cast Ti-47Al-2Nb-1Mn-0.5Mo-0.5W-0.2Si alloy. United States. doi:10.1016/S1359-6462(99)00203-1.
Chen, W.R., Beddoes, J., and Zhao, L. Fri . "Precipitation hardening of the fully lamellar structure of investment cast Ti-47Al-2Nb-1Mn-0.5Mo-0.5W-0.2Si alloy". United States. doi:10.1016/S1359-6462(99)00203-1.
@article{osti_691316,
title = {Precipitation hardening of the fully lamellar structure of investment cast Ti-47Al-2Nb-1Mn-0.5Mo-0.5W-0.2Si alloy},
author = {Chen, W.R. and Beddoes, J. and Zhao, L.},
abstractNote = {This work investigates precipitation hardening of the fully lamellar structure of an investment cast Ti-47Al-2Nb-1Mn-0.5Mo-0.5W-0.2Si alloy. The as cast columnar lamellar structure, as well as the bulk B2 phase and silicides, formed during solidification, complicate the analysis. As such, a full solution treatment in the {alpha} phase field was applied to the as cast material to produce an equiaxed fully lamellar structure without the bulk B2 phase and silicides. This lamellar structure was used as the starting microstructure to investigate precipitation hardening of the fully lamellar structure. When appropriately aged to contain dispersed silicides and/or {beta} particles this structure may have favorable creep properties.},
doi = {10.1016/S1359-6462(99)00203-1},
journal = {Scripta Materialia},
number = 6,
volume = 41,
place = {United States},
year = {1999},
month = {8}
}