Near- threshold Fatigue Crack Growth Behavior and ... - Science Direct

2 downloads 0 Views 875KB Size Report
NearY threshold Fatigue Crack Growth Behavior and Crack. Closure of Natural Gas Pipeline Steels. YoungYpyo Kima,k, CheolYman Kima, WooYsik Kima, ...
Available online at www.sciencedirect.com

Procedia Engineering 10 (2011) 813–820

 

! "# # $  %  &'#( #    & % )! % '   *  +% "-, ./.# " , .0"&, .,-"* 1  ,  " *#1 

'

         ! #"%&$    )+  * ) (  )+*(  ) ) ,    - .   !/&& 0 01 /%##   

 

2#   "# #  )  %   & # 1 #     & %  ) #      . " 743. 75   76  ."           )0#   #   )   .#    

 8 ))       -        #   #  "# #   .# 76 #  #  )  %   & #  # # 743 # # )  )  %   & #  2# )  %   &

#  )# 75  "1  # )# 743  76 #  "# #   $#  743   75  . # 1  # #  #   & %      )2 34           )    -)   5   .#   & %   )# 76  39 # )  % # #       #     5  $  - ) ) %  %)  % # .    )%  #  #  ) 

#   8  % # " %   & %  ) #               ) %  %)  % # . .   #  ))      ) #   &        65987 **    %  #  # 

 & % #  )# 76 # 5  % # " % 

© 2011 Published by Elsevier Ltd. Open access under CC BY-NC-ND license. Selection and peer-review under responsibility of ICM11 

!0: %     !,  #   >!  #  -     #   ,  #  +% F  %% ) #       $  5    #  )   1  #       )# )  %  ) % %)   )  %   &

#  )# M" -  2#     )# )     6987 **   2 1  ?  #  #    ** )2 34   26987 ** $  6    #    # 1  

)2 34   26987 **  )  %  # #      #  #   & %         #     26987 **$  -)) % %) % # . % 1  # # ) 

#   8  Q       ) %  %)  % #    #  ))      ) #   &       )# #       % # #   & % )# 76  #  "# #   % # " %   





 1 



$ 4* )   #)# )  %       )  %   & #  )M" -  = 743.175    76

819

Young-pyo Kim et al. / Procedia Engineering 10 (2011) 813–820

" % "

%$"

       ("#!    "

%

()' &+*

()' &+*

"

       ("#!  ' "

%

" % "

%$ " % "

%$$ "

$ "

$ "

$ %

$ %

$ %

$"

$"

"





#

 ' &++*



"



      ("#!  ''  "

%

()' &+*

"



#

 ' &++*

$"



"





#

 ' &++*

 1 



$ 5)   ))  % ) % %)  )  %   & #  )M" -  = 743