語系:
繁體中文
English
說明(常見問題)
回圖書館首頁
手機版館藏查詢
登入
回首頁
切換:
標籤
|
MARC模式
|
ISBD
Processing, Microstructures and Prop...
~
Schade, Christopher.
FindBook
Google Book
Amazon
博客來
Processing, Microstructures and Properties of a Dual Phase Precipitation-Hardening PM Stainless Steel.
紀錄類型:
書目-語言資料,印刷品 : Monograph/item
正題名/作者:
Processing, Microstructures and Properties of a Dual Phase Precipitation-Hardening PM Stainless Steel./
作者:
Schade, Christopher.
面頁冊數:
167 p.
附註:
Source: Dissertation Abstracts International, Volume: 72-02, Section: B, page: 1136.
Contained By:
Dissertation Abstracts International72-02B.
標題:
Engineering, Mechanical. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3437948
ISBN:
9781124395418
Processing, Microstructures and Properties of a Dual Phase Precipitation-Hardening PM Stainless Steel.
Schade, Christopher.
Processing, Microstructures and Properties of a Dual Phase Precipitation-Hardening PM Stainless Steel.
- 167 p.
Source: Dissertation Abstracts International, Volume: 72-02, Section: B, page: 1136.
Thesis (Ph.D.)--Drexel University, 2010.
To improve the mechanical properties of PM stainless steels in comparison with their wrought counterparts, a PM stainless steel alloy was developed which combines a dual-phase microstructure with precipitation-hardening. The use of a mixed microstructure of martensite and ferrite results in an alloy with a combination of the optimum properties of each phase, namely strength and ductility. The use of precipitation hardening via the addition of copper results in additional strength and hardness. A range of compositions was studied in combination with various sintering conditions to determine the optimal thermal processing to achieve the desired microstructure. The microstructure could be varied from predominately ferrite to one containing a high percentage of martensite by additions of copper and a variation of the sintering temperature before rapid cooling. Mechanical properties (transverse rupture strength (TRS), yield strength, tensile strength, ductility and impact toughness) were measured as a function of the v/o ferrite in the microstructure. A dual phase alloy with the optimal combination of properties served as the base for introducing precipitation hardening. Copper was added to the base alloy at various levels and its effect on the microstructure and mechanical properties was quantified. Processing at various sintering temperatures led to a range of microstructures; dilatometry was used utilized to monitor and understand the transformations and the formation of the two phases.
ISBN: 9781124395418Subjects--Topical Terms:
783786
Engineering, Mechanical.
Processing, Microstructures and Properties of a Dual Phase Precipitation-Hardening PM Stainless Steel.
LDR
:04021nam 2200313 4500
001
1404744
005
20111130125255.5
008
130515s2010 ||||||||||||||||| ||eng d
020
$a
9781124395418
035
$a
(UMI)AAI3437948
035
$a
AAI3437948
040
$a
UMI
$c
UMI
100
1
$a
Schade, Christopher.
$3
1684086
245
1 0
$a
Processing, Microstructures and Properties of a Dual Phase Precipitation-Hardening PM Stainless Steel.
300
$a
167 p.
500
$a
Source: Dissertation Abstracts International, Volume: 72-02, Section: B, page: 1136.
500
$a
Advisers: Roger D. Doherty; Alan Lawley.
502
$a
Thesis (Ph.D.)--Drexel University, 2010.
520
$a
To improve the mechanical properties of PM stainless steels in comparison with their wrought counterparts, a PM stainless steel alloy was developed which combines a dual-phase microstructure with precipitation-hardening. The use of a mixed microstructure of martensite and ferrite results in an alloy with a combination of the optimum properties of each phase, namely strength and ductility. The use of precipitation hardening via the addition of copper results in additional strength and hardness. A range of compositions was studied in combination with various sintering conditions to determine the optimal thermal processing to achieve the desired microstructure. The microstructure could be varied from predominately ferrite to one containing a high percentage of martensite by additions of copper and a variation of the sintering temperature before rapid cooling. Mechanical properties (transverse rupture strength (TRS), yield strength, tensile strength, ductility and impact toughness) were measured as a function of the v/o ferrite in the microstructure. A dual phase alloy with the optimal combination of properties served as the base for introducing precipitation hardening. Copper was added to the base alloy at various levels and its effect on the microstructure and mechanical properties was quantified. Processing at various sintering temperatures led to a range of microstructures; dilatometry was used utilized to monitor and understand the transformations and the formation of the two phases.
520
$a
The aging process was studied as a function of temperature and time by measuring TRS, yield strength, tensile strength, ductility, impact toughness and apparent hardness. It was determined that optimum aging was achieved at 538°C for 1h. Aging at slightly lower temperatures led to the formation of carbides, which contributed to reduced hardness and tensile strength. As expected, at the peak aging temperature, an increase in yield strength and ultimate tensile strength as well as apparent hardness was found. Aging also lead to an unexpected and concurrent increase in ductility and impact toughness. The alloys also showed an increase in strain hardening on aging. The increase in ductility varied with the v/o martensite in the microstructure and was shown to occur after short time intervals at the optimum aging temperature. Compressive strength measurements revealed that the increase in ductility was due to the relaxation of residuals stresses that occur when the high temperature austenite transforms to martensite in the dual phase microstructure. The specific volume of martensite is much larger than that of austenite so that when the transformation takes place, a compressive stress is induced in the ferrite. In the sintered state, the residual stress leads to a higher work hardening rate in tension. When the alloy is aged, the work hardening rate is reduced and the ductility is increased compared with the sintered state, even though aging increases the strength and apparent hardness.
590
$a
School code: 0065.
650
4
$a
Engineering, Mechanical.
$3
783786
650
4
$a
Engineering, Metallurgy.
$3
1023648
650
4
$a
Engineering, Materials Science.
$3
1017759
690
$a
0548
690
$a
0743
690
$a
0794
710
2
$a
Drexel University.
$3
1018434
773
0
$t
Dissertation Abstracts International
$g
72-02B.
790
1 0
$a
Doherty, Roger D.,
$e
advisor
790
1 0
$a
Lawley, Alan,
$e
advisor
790
$a
0065
791
$a
Ph.D.
792
$a
2010
856
4 0
$u
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3437948
筆 0 讀者評論
館藏地:
全部
電子資源
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
預約狀態
備註欄
附件
W9167883
電子資源
11.線上閱覽_V
電子書
EB
一般使用(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
Export
取書館
處理中
...
變更密碼
登入