A Study on Alpha Case Depth in Ti-6Al-2Sn-4Zr-2Mo (PREPRINT)

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Abstract:

Isothermal oxidation experiments in air were performed on Ti-6Al-2Sn-4Zr-2Mo Ti-6242 with a bi-modal microstructure in the temperature range 538-649 deg.C for up to 500 hours and a-case depths were quantified using metallography. Alpha case depth followed a parabolic variation with time. Alpha case depths in excess of 10 um formed above 538 deg. C and 100 h exposures. An activation energy of 244 kJmol was estimated for diffusion of oxygen in the a phase of Ti-6242.

Author(s):
Mcreynolds, Kevin S. ; Tamirisakandala, Seshacharyulu
Author Organization(s):
UES INC DAYTON OH
Descriptive Note:
Journal article (preprint)
Supplementary Note:
Journal article submitted to Metallurgical and Materials Transactiona A. Prepared in cooperation with FMW Composite Systems Inc., Bridgeport, WV.
Pagination:
0013

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-TP2011-4294
Task Number(s):
20
Project Number(s):
4347
Monitor Series:
TP--2011-4294, AFRL-RX-WP
 Subject Terms
Joint Capability Areas:
JCA_6.4.1_Secure Information Exchange; JCA_6.4_Information Assurance; JCA_6_Net Centric; JCA_5_Command and Control; JCA_7.2.1_Mitigate Lethal Effects; JCA_7.2_Mitigate; JCA_7_Protection; JCA_1.2.7_Experimentation; JCA_3.2_Engagement; JCA_3_Force Application; JCA_5.3_Planning; JCA_8_Building Partnerships
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*OXIDATION, ACTIVATION ENERGY, DEPTH, DIFFUSION, ESTIMATES, ISOTHERMS, PARABOLAS, RANGE(EXTREMES), REPRINTS, TEMPERATURE, TIME, VARIATIONS
Field(s)/Group(s):
Organic Chemistry, Metallurgy and Metallography
Keyword(s):
TITANIUM ALLOYS, STATIC OXIDATION, SURFACE DIFFUSION, PE62102F, WUAFRLLM10512P, WUAFRL4347202P
Report Date:
2011 Jul 01
Creation Date:
2011 Nov 17