東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁 到查詢結果 [ null ]

切換: 標籤 | MARC模式 | ISBD

Advancing Experimental Approaches an...

Salehi, Seyyed Danial,

FindBook

Google Book

Amazon

博客來

Advancing Experimental Approaches and Understanding of the Conversion of Plastic Work to Heat in Metals /

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Advancing Experimental Approaches and Understanding of the Conversion of Plastic Work to Heat in Metals // Seyyed Danial Salehi.
作者:	Salehi, Seyyed Danial,
面頁冊數:	1 electronic resource (95 pages)
附註:	Source: Dissertations Abstracts International, Volume: 86-03, Section: B.
Contained By:	Dissertations Abstracts International86-03B.
標題:	Mechanical engineering. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30992437
ISBN:	9798384437420

Advancing Experimental Approaches and Understanding of the Conversion of Plastic Work to Heat in Metals /
Salehi, Seyyed Danial,

Advancing Experimental Approaches and Understanding of the Conversion of Plastic Work to Heat in Metals /Seyyed Danial Salehi. - 1 electronic resource (95 pages)

Source: Dissertations Abstracts International, Volume: 86-03, Section: B.

Lightweighting vehicles in the automotive, railway, and aerospace sectors offers a straightforward strategy to mitigate greenhouse gas emissions, notably CO2, and reduce harmful air pollutants like NOx and SO2, which are detrimental to human health. However, the use of magnesium (Mg) alloys, known for being the lightest structural metals, in essential vehicle components has been constrained. This limitation stems from a lack of comprehensive knowledge about their behavior under adiabatic deformation conditions and the significant anisotropy in their material properties.To increase the throughput and limit the lab-to-lab variability of results reported from the Kolsky bar experiments, the Hough transform analysis was incorporated to offer a robust and quick method of automatically analyzing the data. This approach is agnostic to the loading mode, setup configuration, and usage of pulse shaping, and is robust in the presence of noise.The native surface of Mg alloys has relatively low emissivity in the InfraRed (IR) range, which will make the IR detector output's signal-to-noise ratio relatively low. This problem will affect the measured temperature notoriously, especially at low strains where the temperature rise is small and leads to high uncertainties. Two solutions were offered to tackle this problem: first, the design of a high-efficiency double-Schwarzschild optical system that facilitated the synchronized incorporation of high-speed imaging along with IR thermography; second, the design of a high-emissivity coating based on heat transfer and electromagnetic properties that is suitable for high-strain rate deformation.Having developed all the tools necessary to characterize the thermomechanical properties of Mg alloy AZ31B, the design of experiments targeting the selective activation of different deformation mechanisms was carefully conducted. The integration of digital image correlation allowed for the correction and computing of the local conversion of plastic work to heat. Finally, extensive electron backscattered diffraction analysis and providing the pole figures, grain boundary misorientation histograms, and geometrically necessary dislocations shed light on the relative activation level of different deformation mechanisms. The reported results will significantly improve the simulation parameters associated with the adiabatic deformation simulations of the Mg alloys Mg AZ31B.

English

ISBN: 9798384437420Subjects--Topical Terms:

649730
Mechanical engineering.
Subjects--Index Terms:

Greenhouse gas emissions

Advancing Experimental Approaches and Understanding of the Conversion of Plastic Work to Heat in Metals /
LDR:03936nmm a22004333i 4500 001 2438526
005 20260727134351.5
006 m o d
007 cr|nu||||||||
008 261011s2024 miu||||||m |||||||eng d
020 $a 9798384437420
035 $a (MiAaPQD)AAI30992437
035 $a AAI30992437
040 $a MiAaPQD $b eng $c MiAaPQD $e rda
100 1 $a Salehi, Seyyed Danial, $e author. $3 3829864
245 1 0 $a Advancing Experimental Approaches and Understanding of the Conversion of Plastic Work to Heat in Metals / $c Seyyed Danial Salehi.
264 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2024
300 $a 1 electronic resource (95 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: 86-03, Section: B.
500 $a Advisors: Kingstedt, Owen Committee members: Hochhalter, Jacob Dean; Rao, Sameer R.; Scarpulla, Michael A.; Wang, Pai.
502 $b Ph.D. $c The University of Utah $d 2024.
520 $a Lightweighting vehicles in the automotive, railway, and aerospace sectors offers a straightforward strategy to mitigate greenhouse gas emissions, notably CO2, and reduce harmful air pollutants like NOx and SO2, which are detrimental to human health. However, the use of magnesium (Mg) alloys, known for being the lightest structural metals, in essential vehicle components has been constrained. This limitation stems from a lack of comprehensive knowledge about their behavior under adiabatic deformation conditions and the significant anisotropy in their material properties.To increase the throughput and limit the lab-to-lab variability of results reported from the Kolsky bar experiments, the Hough transform analysis was incorporated to offer a robust and quick method of automatically analyzing the data. This approach is agnostic to the loading mode, setup configuration, and usage of pulse shaping, and is robust in the presence of noise.The native surface of Mg alloys has relatively low emissivity in the InfraRed (IR) range, which will make the IR detector output's signal-to-noise ratio relatively low. This problem will affect the measured temperature notoriously, especially at low strains where the temperature rise is small and leads to high uncertainties. Two solutions were offered to tackle this problem: first, the design of a high-efficiency double-Schwarzschild optical system that facilitated the synchronized incorporation of high-speed imaging along with IR thermography; second, the design of a high-emissivity coating based on heat transfer and electromagnetic properties that is suitable for high-strain rate deformation.Having developed all the tools necessary to characterize the thermomechanical properties of Mg alloy AZ31B, the design of experiments targeting the selective activation of different deformation mechanisms was carefully conducted. The integration of digital image correlation allowed for the correction and computing of the local conversion of plastic work to heat. Finally, extensive electron backscattered diffraction analysis and providing the pole figures, grain boundary misorientation histograms, and geometrically necessary dislocations shed light on the relative activation level of different deformation mechanisms. The reported results will significantly improve the simulation parameters associated with the adiabatic deformation simulations of the Mg alloys Mg AZ31B.
546 $a English
590 $a School code: 0240
650 4 $a Mechanical engineering. $3 649730
650 4 $a Materials science. $3 543314
650 4 $a Thermodynamics. $3 517304
653 $a Greenhouse gas emissions
653 $a Low emissivity
653 $a Optical system
653 $a Thermomechanical properties
653 $a Magnesium
690 $a 0548
690 $a 0794
690 $a 0348
710 2 $a The University of Utah. $b Mechanical Engineering. $e degree granting institution. $3 3823790
720 1 $a Kingstedt, Owen $e degree supervisor.
773 0 $t Dissertations Abstracts International $g 86-03B.
790 $a 0240
791 $a Ph.D.
792 $a 2024
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30992437