Creep of a fine-grained, fully-lamellar, two-phase TiAl alloy at 760°C

J. N. Wang; A. J. Schwartz; T. G. Nieh; C. T. Liu; V. K. Sikka; D. Clemens

Creep of a fine-grained, fully-lamellar, two-phase TiAl alloy at 760°C

J. N. Wang
, A. J. Schwartz
, T. G. Nieh
, C. T. Liu
, V. K. Sikka
, D. Clemens

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

12 Citations (Scopus)

Abstract

Creep of a TiAl alloy, having a composition of Ti-47Al-2Cr-2Nb (in atom %) and a fine-grained, fully-lamellar structure, was carried out at 760°C and stresses between 69-723 MPa. It was found that, in addition to having a good room temperature properties, the alloy exhibits higher creep resistance than other TiAl alloys with a similar composition. Both the creep data and microstructures of the alloy suggest that there exists a change in deformation mechanism from a glide-controlled process at high stresses to a recovery-controlled process at low stresses. Also, microstructural evidence indicates that the rate-controlling recovery mechanism is the climb of dislocation segments pinned by ledges at γ/α₂ interfacial boundaries.

Original language	English
Title of host publication	TMS Annual Meeting
Publisher	Minerals, Metals & Materials Soc (TMS)
Pages	949-957
Publication status	Published - 1995
Externally published	Yes
Event	Conference on Superplasticity and Superplastic Forming - Las Vegas, United States Duration: 13 Feb 1995 → 15 Feb 1995

Conference

Conference	Conference on Superplasticity and Superplastic Forming
Place	United States
City	Las Vegas
Period	13/02/95 → 15/02/95

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@inproceedings{213357dcb6c5471998609b85564a81d3,

title = "Creep of a fine-grained, fully-lamellar, two-phase TiAl alloy at 760°C",

abstract = "Creep of a TiAl alloy, having a composition of Ti-47Al-2Cr-2Nb (in atom \%) and a fine-grained, fully-lamellar structure, was carried out at 760°C and stresses between 69-723 MPa. It was found that, in addition to having a good room temperature properties, the alloy exhibits higher creep resistance than other TiAl alloys with a similar composition. Both the creep data and microstructures of the alloy suggest that there exists a change in deformation mechanism from a glide-controlled process at high stresses to a recovery-controlled process at low stresses. Also, microstructural evidence indicates that the rate-controlling recovery mechanism is the climb of dislocation segments pinned by ledges at γ/α2 interfacial boundaries.",

author = "Wang, \{J. N.\} and Schwartz, \{A. J.\} and Nieh, \{T. G.\} and Liu, \{C. T.\} and Sikka, \{V. K.\} and D. Clemens",

year = "1995",

language = "English",

pages = "949--957",

booktitle = "TMS Annual Meeting",

publisher = "Minerals, Metals \& Materials Soc (TMS)",

note = "Conference on Superplasticity and Superplastic Forming ; Conference date: 13-02-1995 Through 15-02-1995",

}

TY - GEN

T1 - Creep of a fine-grained, fully-lamellar, two-phase TiAl alloy at 760°C

AU - Wang, J. N.

AU - Schwartz, A. J.

AU - Nieh, T. G.

AU - Liu, C. T.

AU - Sikka, V. K.

AU - Clemens, D.

PY - 1995

Y1 - 1995

N2 - Creep of a TiAl alloy, having a composition of Ti-47Al-2Cr-2Nb (in atom %) and a fine-grained, fully-lamellar structure, was carried out at 760°C and stresses between 69-723 MPa. It was found that, in addition to having a good room temperature properties, the alloy exhibits higher creep resistance than other TiAl alloys with a similar composition. Both the creep data and microstructures of the alloy suggest that there exists a change in deformation mechanism from a glide-controlled process at high stresses to a recovery-controlled process at low stresses. Also, microstructural evidence indicates that the rate-controlling recovery mechanism is the climb of dislocation segments pinned by ledges at γ/α2 interfacial boundaries.

AB - Creep of a TiAl alloy, having a composition of Ti-47Al-2Cr-2Nb (in atom %) and a fine-grained, fully-lamellar structure, was carried out at 760°C and stresses between 69-723 MPa. It was found that, in addition to having a good room temperature properties, the alloy exhibits higher creep resistance than other TiAl alloys with a similar composition. Both the creep data and microstructures of the alloy suggest that there exists a change in deformation mechanism from a glide-controlled process at high stresses to a recovery-controlled process at low stresses. Also, microstructural evidence indicates that the rate-controlling recovery mechanism is the climb of dislocation segments pinned by ledges at γ/α2 interfacial boundaries.

UR - https://www.scopus.com/pages/publications/0029459966

UR - https://www.scopus.com/pages/publications/0029459966#tab=impact

M3 - RGC 32 - Refereed conference paper (with host publication)

SP - 949

EP - 957

BT - TMS Annual Meeting

PB - Minerals, Metals & Materials Soc (TMS)

T2 - Conference on Superplasticity and Superplastic Forming

Y2 - 13 February 1995 through 15 February 1995

ER -

Creep of a fine-grained, fully-lamellar, two-phase TiAl alloy at 760°C

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