ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Thermal simulating technology was used to simulate weld CGHAZ of microalloyedsteel with different thermal cycle for the purpose of investigation on morphology of M-Aconstituent and its influence on toughness. The experimental results showed that in comparisonwith base metal specimens after thermal cycle have poorer toughness for its larger size, elongatedand sharp massive shape and non-uniform distribution. Toughness of specimen value hasmaximum value with maximum area fraction for cooling time of 7s, and then it will drop whethercooling time is longer or shorter. Moreover, its mean chords of all specimens are all smaller than0.5μm. Only those with the length larger than 2μm or the length-width ratio exceeding 4, cleavagefracture can occur. So it is concluded that M-A constituent is not the main influencing factor ofimpairing toughness for steel with different thermal cycle for its smaller mean chord and areafraction
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.575-578.690.pdf
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