Resetting microstructures and properties in TRIP-assisted advanced high strength steels
Name
1057019919-MIT.pdf
Description
Full printable version
Size
7.92 MB
Format
Adobe PDF
Checksum (MD5)
ad01a64246b2ba37db3abbd89b3d0eb1
Author(s)
Jiang, Menglei (Scientist in mechanical engineering) Massachusetts Institute of Technology
Advisor(s)
C. Cem Tasan.
Date Issued
2018
Publisher
Massachusetts Institute of Technology
Abstract
Metals are widely used structural materials in automotive, packaging, construction, and machines. Driven by demands to decrease greenhouse gas emissions, the reuse, re-forming, and re-manufacturing of metals draws great attention. However, current processes such as mechanical joining, welding, coating, etc. have key practical and theoretical limitations. Recently, a new reuse strategy is proposed, which aims to reset the microstructures of materials to maintain performance and increase lifetime. We refer to alloys that demonstrate this capability as resettable alloys. One resettable alloy is the transformation-induced plasticity-maraging (TRIP-maraging) steel. However, current resettable TRIP-maraging steels require long and unfeasible resetting treatments. The limit of resetting kinetics has not been reached and the microstructure resetting mechanism has not been fully understood. Here we focus on providing a deeper understanding of the resetting mechanism in TRIP-maraging steel, such as the effects of composition and pre-strain, to increase the kinetics of the underlying transformations. This study demonstrates that with proper microstructure design, the resetting process could be completed within minutes following a critical level of deformation.
Description
Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2018.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 53-57).
Subjects
Mechanical Engineering.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
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