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Influence of Composition and Aging Heat Treatment on the Microstructure and Strength of In


J o u r n a l   o f Ma t e r i a l s   S c i e n c e   a n d   E n g i n e e r i n g   A   7 ( 9 - l O ) ( 2 0 1 7 ) 2 7 1 ? 2 7 9   d o i :1 0 . 1 7 2 6 5 / 2 1 6 1 - 6 21 3 , 2 0 l 7 . 9 一 t 0 . 0 0 5   I n f l uen c e   of   Com p osi t i on   and   Agi ng   He a t   Tr e a t m en t   on   t he   Mi cr os t r u C t ur e   and   St r eng t h   of   I nn ov a t i v e ? Ca r bon   F r e e   1   0 % Cob al t ? Ma r a gi ng   St e e l   Powder   Com po si t e s   Wa l e e d   El g h a z a l y   , Omy ma   E l k a d y   , S a b i n e   We i s s  a n d   S a i e d   El g h a z a l y   . Ce n t r a l Me t a l l u r g i c a l R &D I n s t i t u t e - , P. 0. Bo x   8 7 - He l wa n , Ca i r o , Eg y pt   2 . He a d   o f Ma t e r i a l   S c i e n c e&T e c h n o l o g y   De p t . . T U  C o t t b u s — G e r ma n y   Ab s t r a c t : Go o d   c o mb i n a t i o n s   b e t we e n   s t r e n g t h   a n d   t o u g h B e s s   a r e   a l wa y s   t h e   a i m  o f   a l l   r e s e rc a h e r s   wo r k i n g   i n   t h e   ie f l d   o f   ma t e r i a l   s c i e n c e . Ma ra g i n g   s t e e l   g r a d e s ( 2 0 0 — 3 0 0 ) re a   o n e   o f   he t   we l l   k n o w n   s t e e l   a l l o y s   p r o v e d   t o   h a v e   g o o d   s t r e n g t h   nd a   t o u g h n e s s   nd a   re a   no k wn   a s   1   8 % Ni - Co - Mo   s t e e l   f a mi l y. Ma r a g i n g   s t e e l s   p r o d u c t i o n ,i mp o r t 。 a n d   e x p o t  r b y   c e r t a i n   c o

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