Evaluation of fracture toughness and impact toughness of laser rapid manufactured Inconel-625 structures and their co-relation
The present study involves evaluation of fracture toughness (crack tip opening displacement) and Chapry impact toughness of Inconel 625 structures fabricated by laser based additive manufacturing.The results of fracture toughness are close to those reported for the Inconel 625 weld metal.The nature of the load-time traces of instrumented Charpy impact tests revealed that the alloy Inconel 625 in laser fabricated condition was associated with fully ductile behavior with Charpy-V notch impact energy in the range of 48- 54 J.Stress relieving heat treatment at 950 °C for 1 hour has resulted in marginal improvement in the impact toughness by about 10 %,whereas no clear evidence of such improvement is seen in the CTOD fracture toughness.Fractographic examination of the Chapry specimens and the results of the instrumented impact tests imply that the mechanism of crack growth was propagation controlled under dynamic loading conditions.Dynamic fracture parameters were estimated from the instrumented impact test data and compared with the experimentally evaluated fracture toughness results.
Laser rapid manufacturing Inconel-625 CTOD fracture toughness Instrumented impact test
Ganesh Puppala Aniruddha Moitra S. Sathyanarayanan Rakesh Kaul Sasikala G Ram Chandra Prasad Lalit. M. Kukreja
Raja Ramanna Centre for Advanced Technology,Indore 452013,India Indira Gandhi Centre for Atomic Research,Kalpakkam 603102,India Metallurgical Engg.& Materials Science Department,Indian Institute of Technology Bombay,Mumbai,40007
国际会议
北京
英文
1-10
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）