東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Effect of Thermomechanical Processin...

Cardoso, Rogerio Antao,

Linked to FindBook

Google Book

Amazon

博客來

Effect of Thermomechanical Processing and Heat Treatment on the Microstructure and Mechanical Properties of Ultra-High Strength Steels /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Effect of Thermomechanical Processing and Heat Treatment on the Microstructure and Mechanical Properties of Ultra-High Strength Steels // Rogerio Antao Cardoso.
Author:	Cardoso, Rogerio Antao,
Description:	1 electronic resource (149 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 86-08, Section: B.
Contained By:	Dissertations Abstracts International86-08B.
Subject:	Materials science. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31557452
ISBN:	9798302883858

Effect of Thermomechanical Processing and Heat Treatment on the Microstructure and Mechanical Properties of Ultra-High Strength Steels /
Cardoso, Rogerio Antao,

Effect of Thermomechanical Processing and Heat Treatment on the Microstructure and Mechanical Properties of Ultra-High Strength Steels /Rogerio Antao Cardoso. - 1 electronic resource (149 pages)

Source: Dissertations Abstracts International, Volume: 86-08, Section: B.

A martensite-based and an austenite-based Fe-Mn-Al steels were investigated aiming the pilot-scale production of steels that meet military specifications for Rolled Homogeneous Armor (RHA) and High-hardness Armor (HHA) plates. Each material underwent specific thermomechanical processes and the following hardness, Charpy V-notch (CVN) impact toughness at -40 °C and room-temperature tensile properties were correlated with the resulting microstructures.Specimens of the martensitic steel were austenitized at 1010 °C, quenched and tempered at 150, 175, 200, 225 and 250 °C for times up to four hours. As for the Fe-Mn-Al steel, its hot rolling schedule was design to promote strain accumulation in the as-rolled matrix, which is conducive to the precipitation of NiAl during annealing heat treatments. Specimens of this steel were annealed at 700, 750, 800 and 900 °C for times up to one hour.The results show evidence of tempered martensite embrittlement (TME) in the martensite-based steel, especially when tempered for four hours at the investigated temperature range.Regarding the Fe-Mn-Al steel, electron backscattered analyses (EBSD) revealed strain accumulation in the as-rolled austenitic matrix. Annealing at 750 °C for 30 min. strengthened the steel through intra-granular precipitation of NiAl. It was followed by a drop in the CVN impact toughness. Nevertheless, literature review showed that the investigated material outperformed similar austenite-based Fe-Mn-Al steels strengthened through k-carbide.

English

ISBN: 9798302883858Subjects--Topical Terms:

543314
Materials science.
Subjects--Index Terms:

Martensite

Effect of Thermomechanical Processing and Heat Treatment on the Microstructure and Mechanical Properties of Ultra-High Strength Steels /
LDR:03050nmm a22004213i 4500 001 2433742
005 20250905091003.5
006 m o d
007 cr|nu||||||||
008 261011s2024 miu||||||m |||||||eng d
020 $a 9798302883858
035 $a (MiAaPQD)AAI31557452
035 $a AAI31557452
040 $a MiAaPQD $b eng $c MiAaPQD $e rda
100 1 $a Cardoso, Rogerio Antao, $e author. $3 3823481
245 1 0 $a Effect of Thermomechanical Processing and Heat Treatment on the Microstructure and Mechanical Properties of Ultra-High Strength Steels / $c Rogerio Antao Cardoso.
264 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2024
300 $a 1 electronic resource (149 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Dissertations Abstracts International, Volume: 86-08, Section: B.
500 $a Advisors: Bartlett, Laura N. Committee members: Buchely, Mario; O'Malley, Ronald; Chandrashekhara, K.; Gu, Yijia.
502 $b Ph.D. $c Missouri University of Science and Technology $d 2024.
520 $a A martensite-based and an austenite-based Fe-Mn-Al steels were investigated aiming the pilot-scale production of steels that meet military specifications for Rolled Homogeneous Armor (RHA) and High-hardness Armor (HHA) plates. Each material underwent specific thermomechanical processes and the following hardness, Charpy V-notch (CVN) impact toughness at -40 °C and room-temperature tensile properties were correlated with the resulting microstructures.Specimens of the martensitic steel were austenitized at 1010 °C, quenched and tempered at 150, 175, 200, 225 and 250 °C for times up to four hours. As for the Fe-Mn-Al steel, its hot rolling schedule was design to promote strain accumulation in the as-rolled matrix, which is conducive to the precipitation of NiAl during annealing heat treatments. Specimens of this steel were annealed at 700, 750, 800 and 900 °C for times up to one hour.The results show evidence of tempered martensite embrittlement (TME) in the martensite-based steel, especially when tempered for four hours at the investigated temperature range.Regarding the Fe-Mn-Al steel, electron backscattered analyses (EBSD) revealed strain accumulation in the as-rolled austenitic matrix. Annealing at 750 °C for 30 min. strengthened the steel through intra-granular precipitation of NiAl. It was followed by a drop in the CVN impact toughness. Nevertheless, literature review showed that the investigated material outperformed similar austenite-based Fe-Mn-Al steels strengthened through k-carbide.
546 $a English
590 $a School code: 0587
650 4 $a Materials science. $3 543314
650 4 $a Physical chemistry. $3 1981412
653 $a Martensite
653 $a Nial
653 $a Strain accumulation
653 $a Tempered martensite embrittlement
653 $a Tempering
690 $a 0794
690 $a 0494
710 2 $a Missouri University of Science and Technology. $b Materials Science and Engineering. $e degree granting institution. $3 3820944
720 1 $a Bartlett, Laura N. $e degree supervisor.
773 0 $t Dissertations Abstracts International $g 86-08B.
790 $a 0587
791 $a Ph.D.
792 $a 2024
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31557452