Abstract
The V-notch impact properties of a laminated composite based on ultrahigh carbon steel (UHCS) and Hadfield manganese steel (HMS) were investigated in the temperature range -196 to 25°C. The impact properties were evaluated after heat treatment above the A1 transformation temperature of the ultrahigh carbon steel. The laminated composite exhibits a DBTT of -100°C which is lower than either of the monolithic steels that make up the laminate. This is a result of notch blunting from two sources; one source is delamination at the laminate interfaces, and the other source is plastic flow in the HMS matrix. A selectively heat treated laminated composite with very hard UHCS layers (Rc = 66) and soft HMS layers (Rc = 17) exhibits a good notch impact toughness of 51J at room temperature. This is attributed to crack blunting by the tough HMS layers and to cracking of the UHCS layers during impact.
| Original language | English |
|---|---|
| Pages (from-to) | 233-248 |
| Number of pages | 16 |
| Journal | Res mechanica |
| Volume | 31 |
| Issue number | 3 |
| State | Published - 1990 |