Language:
繁體中文
English
日文
說明(常見問題)
南開科技大學
圖書館首頁
編目中圖書申請
登入
回首頁
切換:
標籤
|
MARC模式
|
ISBD
Crack initiation modeling of a direc...
~
Georgia Institute of Technology.
Crack initiation modeling of a directionally-solidified nickel-base superalloy.
紀錄類型:
書目-電子資源 : 單行本
正題名/作者:
Crack initiation modeling of a directionally-solidified nickel-base superalloy./
作者:
Gordon, Ali Page.
面頁冊數:
481 p.
附註:
Source: Dissertation Abstracts International, Volume: 67-03, Section: B, page: 1656.
Contained By:
Dissertation Abstracts International67-03B.
標題:
Engineering, Mechanical. -
電子資源:
Download PDF (下載PDF全文)
ISBN:
9780542606472
Crack initiation modeling of a directionally-solidified nickel-base superalloy.
Gordon, Ali Page.
Crack initiation modeling of a directionally-solidified nickel-base superalloy.
- 481 p.
Source: Dissertation Abstracts International, Volume: 67-03, Section: B, page: 1656.
Thesis (Ph.D.)--Georgia Institute of Technology, 2006.
Combustion gas turbine components designed for application in electric power generation equipment are subject to periodic replacement as a result of cracking, damage, and mechanical property degeneration that render them unsafe for continued operation. In view of the significant costs associated with inspecting, servicing, and replacing damaged components, there has been much interest in developing models that not only predict service life, but also estimate the evolved microstructural state of the material. This thesis explains manifestations of microstructural damage mechanisms that facilitate fatigue crack nucleation in a newly-developed directionally-solidified (DS) Ni-base superalloy components exposed to elevated temperatures and high stresses. In this study, models were developed and validated for damage and life prediction using DS GTD-111 as the subject material. This material, proprietary to General Electric Energy, has a chemical composition and grain structure designed to withstand creep damage occurring in the first and second stage blades of gas-powered turbines. The service conditions in these components, which generally exceed 600°C, facilitate the onset of one or more damage mechanisms related to fatigue, creep, or environment.
ISBN: 9780542606472Subjects--Topical Terms:
170925
Engineering, Mechanical.
Crack initiation modeling of a directionally-solidified nickel-base superalloy.
LDR
:03709nmm 2200289 4500
001
1000004872
005
20070601084714.5
008
070601s2006 eng d
020
$a
9780542606472
035
$a
(UnM)AAI3212226
035
$a
AAI3212226
040
$a
UnM
$c
UnM{me_controlnum}
100
1
$a
Gordon, Ali Page.
$3
1000006005
245
1 0
$a
Crack initiation modeling of a directionally-solidified nickel-base superalloy.
300
$a
481 p.
500
$a
Source: Dissertation Abstracts International, Volume: 67-03, Section: B, page: 1656.
500
$a
Adviser: David L. McDowell.
502
$a
Thesis (Ph.D.)--Georgia Institute of Technology, 2006.
520
$a
Combustion gas turbine components designed for application in electric power generation equipment are subject to periodic replacement as a result of cracking, damage, and mechanical property degeneration that render them unsafe for continued operation. In view of the significant costs associated with inspecting, servicing, and replacing damaged components, there has been much interest in developing models that not only predict service life, but also estimate the evolved microstructural state of the material. This thesis explains manifestations of microstructural damage mechanisms that facilitate fatigue crack nucleation in a newly-developed directionally-solidified (DS) Ni-base superalloy components exposed to elevated temperatures and high stresses. In this study, models were developed and validated for damage and life prediction using DS GTD-111 as the subject material. This material, proprietary to General Electric Energy, has a chemical composition and grain structure designed to withstand creep damage occurring in the first and second stage blades of gas-powered turbines. The service conditions in these components, which generally exceed 600°C, facilitate the onset of one or more damage mechanisms related to fatigue, creep, or environment.
520
$a
The study was divided into an empirical phase, which consisted of experimentally simulating service conditions in fatigue specimens, and a modeling phase, which entailed numerically simulating the stress-strain response of the material. Experiments have been carried out to simulate a variety of thermal, mechanical, and environmental operating conditions endured by longitudinally (L) and transversely (T) oriented DS GTD-111. Both in-phase and out-of-phase thermo-mechanical fatigue tests were conducted. In some cases, tests in extreme environments/temperatures were needed to isolate one or at most two of the mechanisms causing damage. Microstructural examinations were carried out via SEM and optical microscopy. A continuum crystal plasticity model was used to simulate the material behavior in the L and T orientations. The constitutive model was implemented in ABAQUS and a parameter estimation scheme was developed to obtain the material constants. A physically-based model was developed for correlating crack initiation life based on the experimental life data and predictions are made using the crack initiation model. Assuming a unique relationship between the damage fraction and cycle fraction with respect to cycles to crack initiation for each damage mode, the total crack initiation life has been represented in terms of the individual damage components (fatigue, creep-fatigue, creep, and oxidation-fatigue) observed at the end state of crack initiation.
590
$a
School code: 0078.
650
4
$a
Engineering, Mechanical.
$3
170925
650
4
$a
Engineering, Materials Science.
$3
1000005553
690
$a
0548
690
$a
0794
710
2 0
$a
Georgia Institute of Technology.
$3
1000005517
773
0
$t
Dissertation Abstracts International
$g
67-03B.
790
1 0
$a
McDowell, David L.,
$e
advisor
790
$a
0078
791
$a
Ph.D.
792
$a
2006
856
4 0
$u
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3212226
$z
Download PDF (下載PDF全文)
0 筆讀者評論
館藏地:
全部
線上資料庫
出版年:
卷號:
館藏
1 筆 • 頁數 1 •
1
條碼號
典藏地名稱
館藏流通類別
資料類型
索書號
使用類型
借閱狀態
預約人數
備註欄
附件
OE0000847
線上資料庫
線上資源
線上電子書
OE
一般(Normal)
在架
0
1 筆 • 頁數 1 •
1
多媒體
評論
新增評論
分享你的心得
建立或儲存個人書籤
書目轉出
取書館別
處理中
...
變更密碼
登入