title: [Structural characteristics of laser-welded cast pure titanium joints by different gap distance].
abstract: OBJECTIVE
  To measure the microstructure of laser-welded cast pure titanium by different gap distance.
  
  
  METHODS
  Forty specimens were sectioned and welded at four gaps (0.00 mm, 0.25 mm, 0.50 mm and 1.00 mm). Took microhardness test and metallographic examination of welded zone surface.
  
  
  RESULTS
  There were no difference in microhardness value and metallographic observation between welded specimens. The width of heat-effected zone was different. The smaller grains and needle-like alphamartensitic structure were found in the heat-affected zone.
  
  
  CONCLUSIONS
  The effects of the joint gap were not significant.
authors.affiliation: Dept. of Stomatology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450002, China.
authors.forename: Juan-Fang
authors.initials: JF
authors.lastname: Zhu
authors.forename: Hui-Ming
authors.initials: HM
authors.lastname: He
authors.forename: Fang
authors.initials: F
authors.lastname: Liu
authors.forename: Chun-Bao
authors.initials: CB
authors.lastname: Zhang
authors.forename: Zhong-Yi
authors.initials: ZY
authors.lastname: Wang
mesh_terms: D012994:Dental Soldering; D007834:Lasers; D008422:Materials Testing; D014025:Titanium
chemical_list: D014025:Titanium