Refining of cast microstructure of Ti46Al8.5Nb0.2W alloy by heat treatment

Zi cheng Liu; Shu jiang Li; Jun pin Lin; Guo liang Chen

Refining of cast microstructure of Ti46Al8.5Nb0.2W alloy by heat treatment

Zi cheng Liu^*
, Shu jiang Li
, Jun pin Lin
, Guo liang Chen

^*Corresponding author for this work

University of Science and Technology Beijing

Research output: Contribution to journal › Article › peer-review

Abstract

The gas fan cooling/tempering and subsequent (1000 C⇔1200 °C)×4 cycles heat treatment, instead of the conventional forging process, was investigated to refine the microstructure of cast Ti46AI8.5Nb0.2W alloy. By tempering the gas fan cooled metastable structure at temperature above α transus, the cast microstructure can be destroyed rapidly and the fine and homogeneous duplex microstructure was developed in cast Ti46AI8.5Nb0.2W alloy. It has been found that the duplex microstructure can be transformed into the fine and homogeneous NG microstructure by the (1000 °C⇔1200 °C)×4 cycles heat treatment. The mechanisms involve preventing the existent γ grains from growing anomalously and globularizing the metastable lamellar structure produced during air cooling from 1250 °C into NG microstructure.

Original language	English
Pages (from-to)	1-5
Number of pages	5
Journal	Journal of Aeronautical Materials
Volume	19
Issue number	4
State	Published - 1999
Externally published	Yes

Cite this

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title = "Refining of cast microstructure of Ti46Al8.5Nb0.2W alloy by heat treatment",

abstract = "The gas fan cooling/tempering and subsequent (1000 C⇔1200 °C)×4 cycles heat treatment, instead of the conventional forging process, was investigated to refine the microstructure of cast Ti46AI8.5Nb0.2W alloy. By tempering the gas fan cooled metastable structure at temperature above α transus, the cast microstructure can be destroyed rapidly and the fine and homogeneous duplex microstructure was developed in cast Ti46AI8.5Nb0.2W alloy. It has been found that the duplex microstructure can be transformed into the fine and homogeneous NG microstructure by the (1000 °C⇔1200 °C)×4 cycles heat treatment. The mechanisms involve preventing the existent γ grains from growing anomalously and globularizing the metastable lamellar structure produced during air cooling from 1250 °C into NG microstructure.",

author = "Liu, \{Zi cheng\} and Li, \{Shu jiang\} and Lin, \{Jun pin\} and Chen, \{Guo liang\}",

year = "1999",

language = "英语",

volume = "19",

pages = "1--5",

journal = "Journal of Aeronautical Materials",

issn = "1005-5053",

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TY - JOUR

T1 - Refining of cast microstructure of Ti46Al8.5Nb0.2W alloy by heat treatment

AU - Liu, Zi cheng

AU - Li, Shu jiang

AU - Lin, Jun pin

AU - Chen, Guo liang

PY - 1999

Y1 - 1999

N2 - The gas fan cooling/tempering and subsequent (1000 C⇔1200 °C)×4 cycles heat treatment, instead of the conventional forging process, was investigated to refine the microstructure of cast Ti46AI8.5Nb0.2W alloy. By tempering the gas fan cooled metastable structure at temperature above α transus, the cast microstructure can be destroyed rapidly and the fine and homogeneous duplex microstructure was developed in cast Ti46AI8.5Nb0.2W alloy. It has been found that the duplex microstructure can be transformed into the fine and homogeneous NG microstructure by the (1000 °C⇔1200 °C)×4 cycles heat treatment. The mechanisms involve preventing the existent γ grains from growing anomalously and globularizing the metastable lamellar structure produced during air cooling from 1250 °C into NG microstructure.

AB - The gas fan cooling/tempering and subsequent (1000 C⇔1200 °C)×4 cycles heat treatment, instead of the conventional forging process, was investigated to refine the microstructure of cast Ti46AI8.5Nb0.2W alloy. By tempering the gas fan cooled metastable structure at temperature above α transus, the cast microstructure can be destroyed rapidly and the fine and homogeneous duplex microstructure was developed in cast Ti46AI8.5Nb0.2W alloy. It has been found that the duplex microstructure can be transformed into the fine and homogeneous NG microstructure by the (1000 °C⇔1200 °C)×4 cycles heat treatment. The mechanisms involve preventing the existent γ grains from growing anomalously and globularizing the metastable lamellar structure produced during air cooling from 1250 °C into NG microstructure.

UR - https://www.scopus.com/pages/publications/0033311953

M3 - 文章

AN - SCOPUS:0033311953

SN - 1005-5053

VL - 19

SP - 1

EP - 5

JO - Journal of Aeronautical Materials

JF - Journal of Aeronautical Materials

IS - 4

ER -

Refining of cast microstructure of Ti46Al8.5Nb0.2W alloy by heat treatment

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