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Title: Blended elemental P/M synthesis of Ti-6Al-1.7Fe-0.1Si alloy with improved high cycle fatigue strength

Abstract

Titanium alloys are attractive materials for aircraft and automobile application due to their high strength to weight ratio and excellent corrosion resistance. However, the use of titanium alloys in these industrial area is still limited due to the high manufacturing cost associated with the expensiveness of raw materials and processing difficulty. The production of titanium alloys using a blended elemental (BE) powder metallurgy (P/M) method has potential to overcome this cost problem. However, conventionally processed BE P/M titanium alloys show inferior high cycle fatigue strength due to the microstructural formation of {alpha}-platelet colony and a massive grain boundary alpha (GB{alpha}) phase. In the present study, the new processing method was applied to an {alpha}-{beta} type Ti-6Al-1.7Fe-0.1Si (Ti-62S) alloy in order to investigate the effect of microstructural modification on the high cycle fatigue strength. Ti-62S alloy is a new low cost {alpha}-{beta} type alloy developed by Timet which is expected to replace with the Ti-6Al-4V alloy in the areas of automobile parts.

Authors:
;  [1];  [2]
  1. National Research Inst. for Metals, Tsukuba, Ibaraki (Japan)
  2. Korea Inst. of Machinery and Materials, Changwon (Korea, Republic of)
Publication Date:
OSTI Identifier:
665167
Resource Type:
Journal Article
Journal Name:
Scripta Materialia
Additional Journal Information:
Journal Volume: 39; Journal Issue: 9; Other Information: PBD: 5 Oct 1998
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; FATIGUE; HOT PRESSING; TITANIUM BASE ALLOYS; ALUMINIUM ALLOYS; IRON ALLOYS; SILICON ADDITIONS; POWDER METALLURGY; HEAT TREATMENTS; GRAIN SIZE

Citation Formats

Hagiwara, M, Emura, S, and Kim, S J. Blended elemental P/M synthesis of Ti-6Al-1.7Fe-0.1Si alloy with improved high cycle fatigue strength. United States: N. p., 1998. Web. doi:10.1016/S1359-6462(98)00310-8.
Hagiwara, M, Emura, S, & Kim, S J. Blended elemental P/M synthesis of Ti-6Al-1.7Fe-0.1Si alloy with improved high cycle fatigue strength. United States. https://doi.org/10.1016/S1359-6462(98)00310-8
Hagiwara, M, Emura, S, and Kim, S J. 1998. "Blended elemental P/M synthesis of Ti-6Al-1.7Fe-0.1Si alloy with improved high cycle fatigue strength". United States. https://doi.org/10.1016/S1359-6462(98)00310-8.
@article{osti_665167,
title = {Blended elemental P/M synthesis of Ti-6Al-1.7Fe-0.1Si alloy with improved high cycle fatigue strength},
author = {Hagiwara, M and Emura, S and Kim, S J},
abstractNote = {Titanium alloys are attractive materials for aircraft and automobile application due to their high strength to weight ratio and excellent corrosion resistance. However, the use of titanium alloys in these industrial area is still limited due to the high manufacturing cost associated with the expensiveness of raw materials and processing difficulty. The production of titanium alloys using a blended elemental (BE) powder metallurgy (P/M) method has potential to overcome this cost problem. However, conventionally processed BE P/M titanium alloys show inferior high cycle fatigue strength due to the microstructural formation of {alpha}-platelet colony and a massive grain boundary alpha (GB{alpha}) phase. In the present study, the new processing method was applied to an {alpha}-{beta} type Ti-6Al-1.7Fe-0.1Si (Ti-62S) alloy in order to investigate the effect of microstructural modification on the high cycle fatigue strength. Ti-62S alloy is a new low cost {alpha}-{beta} type alloy developed by Timet which is expected to replace with the Ti-6Al-4V alloy in the areas of automobile parts.},
doi = {10.1016/S1359-6462(98)00310-8},
url = {https://www.osti.gov/biblio/665167}, journal = {Scripta Materialia},
number = 9,
volume = 39,
place = {United States},
year = {1998},
month = {10}
}