Effects of the thickness of the pre-placed layer on microstructural evolution and mechanical properties of the laser-clad coatings

The coatings with different pre-placed layer thickness values were fabricated on Ti6AI4V substrates by laser cladding NiCrBS1 alloy powders. Surface characteristics and inner defects of the coatings were analyzed. The critical value (1.0 mm) of maximum allowable pre-placed layer thickness was obtain...

Full description

Saved in:
Bibliographic Details
Published inJournal of alloys and compounds Vol. 644; pp. 450 - 463
Main Authors Qu, C.C., Li, J., Bai, L.L., Shao, J.Z., Song, R., Chen, J.L.
Format Journal Article
LanguageEnglish
Published 25.09.2015
Subjects
Coatings
Evolution
Fracture toughness
Laser beam cladding
Microhardness
Microstructure
Protective coatings
Wear resistance
Online AccessGet full text

Cover

More Information
Summary:The coatings with different pre-placed layer thickness values were fabricated on Ti6AI4V substrates by laser cladding NiCrBS1 alloy powders. Surface characteristics and inner defects of the coatings were analyzed. The critical value (1.0 mm) of maximum allowable pre-placed layer thickness was obtained. For the coatings with 0.5, 0.8 and 1.0 mm in pre-placed layer thickness, the dilution rate, micro-structural evolution, micro-hardness, fracture toughness and wear behavior were measured and analyzed. The coating with 1.0 mm pre-placed layer thickness possessed more excellent wear resistance because of its higher micro-hardness (resistance to micro-cutting), fracture toughness (resistance to brittle debonding) and the protection of the transfer layer.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0925-8388
DOI:10.1016/j.jallcom.2015.05.081