| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Developments in Plate and Line Pipe Steels
|
| Presentation Title |
Modified Charpy V-notch Testing of Wind Tower Steels |
| Author(s) |
Keith Allen Taylor, Laura Dawson, Matthew Werner |
| On-Site Speaker (Planned) |
Keith Allen Taylor |
| Abstract Scope |
Modern low-carbon microalloyed HSLA steels exhibit high toughness and are widely used in structural applications. Toughness levels are often so high that obtaining valid results in Charpy V-notch impact toughness testing is difficult. In some cases, sub-size specimens are employed to avoid exceeding the test machine’s energy capacity. Also, plastic deformation during the test can be extensive and complete fracture of the test specimen may not occur. Recent investigations have employed a modified Charpy specimen configuration with side grooves that produce an increased degree of constraint and a more plane strain stress state during the test. The amount of plastic deformation and energy absorption are reduced substantially. Also, stresses parallel to the notch root are increased, resulting in a greater propensity for “splitting” during fracture. This investigation employed both standard and side-grooved CVN specimens to characterize the toughness of five Nb- and V-microalloyed plate steels suitable for wind turbine towers. |