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:
Hot-dip galvanized transformation induced plasticity (TRIP) steel sheets were recentlydeveloped for automotive applications. The microstructure and the adhesion of zinc coated CMnSiTRIP steel alloyed with P were studied. The α-Zn coating adjacent to the steel substrate consists of acontinuous η-Fe2Al5-xZnx inhibition layer with columnar ζ-FeZn13 intermetallic particles on top.Along the interface between the inhibition layer and the steel substrate Mn/Mn-P oxides werefrequently observed. Although these oxides at the steel surface reduce the adhesion between the zinccoating and the TRIP steel, they do not cause any bare spots during galvanizing. Upon tensiledeformation of the galvanized steel sheet, cracking along the α-zinc grain boundaries precededfracture of the interface between the α-Zn layer and the inhibition layer. After 4 % deformation theaverage interface crack length increased linearly with the applied strain. This interface fracture wasstrongly influenced by the crystalline orientation of the α-Zn grains
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.1104.pdf
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