Journal
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
Volume 34, Issue 1, Pages 39-57Publisher
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2017.10.024
Keywords
Joining; Stainless steels; Carbon steels; High strength low alloy (HSLA) steels; Advanced high strength steels (AHSS); Oxide dispersion strengthened (ODS) steels
Funding
- Div Of Civil, Mechanical, & Manufact Inn [1405508] Funding Source: National Science Foundation
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Considerable progress has been achieved in friction stir welding (FSW) of steels in every aspect of tool fabrication, microstructure control and properties evaluation in the past two decades. With the development of reliable welding tools and precise control systems, FSW of steels has reached a new level of technical maturity. High-quality, long welds can be produced in many engineering steels. Compared to traditional fusion welding, FSW exhibits unique advantages producing joints with better properties. As a result of active control of the welding temperature and/or cooling rate, FSW has the capability of fabricating steel joints with excellent toughness and strength. For example, unfavorable phase transformations that usually occur during traditional welding can be avoided and favorable phase fractions in advanced steels can be maintained in the weld zone thus avoiding the typical property degradations associated with fusion welding. If phase transformations do occur during FSW of thick steels, optimization of microstructure and properties can be attained by controlling the heat input and post-weld cooling rate. (C) 2017 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
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