TY  - BOOK
AU  - Sharma, Leeladhar
AU  - Chhibber, Rahul
AU  - Arora, Kanwer Singh
TI  - Resistance Spot Welding of Galvanized Advanced High Strength Steel DP-780
U1  - 671.52 
PY  - 2018///
CY  - IIT Jodhpur
PB  - Department of Mechanical Engineering
KW  - Resistance Spot Welding
KW  - MTech Theses
KW  - Department of Mechanical Engineering
N2  - This  work  was  focused  on  the  investigation  and  growth  of  resistance  spot welding  of  automotive  grade  Advanced  High  Strength  Steel  DP-780.  Experimental work was carried out on different resistance spot welded specimens. The main purpose of  this  work  was  to  find  out  the  adequate  range  of  spot  weld  parameters  for  AHSS galvanized  DP-780  steel. Selection  of  welding parameters  should  be suchthat nugget pulloutfrom  the  sheetcan  be  assuredto ascertainthe  reliability  of  resistance  spot welds.  In  this  workone  factor  at  a  time  (OFAT)  approachwas  followed  to  investigatethe influenceofwelding  parameters  viz.  weld  current,  weld  time,  and  electrode pressureon  the  nugget developmentand  strength  of  the weldments.  Effects  of  some other  interdisciplinary  data  like,  heat  input,  mean  DCR,  failure  energy  etc.  were investigated as well. Increase inwelding current value abovea certain critical value led to   the   transition   from   interfacial   failure   mode   to   pullout   failure   mode   resulting improved energy absorption capacity of the joint.Two stacksresistance spot welding is mostly used in automotive body structureapplications. Nevertheless,  in automobile  or  other many  applications,resistancespot welds  between multiple stacksheets are requireddue to some limitations in structural designof  the  components.  So  here  a  small  experimental  analysis  on  three  stack resistance  spot  welding  in  addition  to  two  stack  resistance  spot  welding  was  also carried  out.  of  the  resistance  spot  welds  were  investigated  using  for  three  stack resistance spot welding. Similarto two stack resistance spot weldingone factor at a time approachwas   used   to  analyze  and  investigatetheinfluenceof  variouswelding variablesviz. weldingcurrent, weldingtime, and electrode force on the nugget growth, nugget size and tensile shear strength

ER  -