Micro structure observation for low carbon steel base material and heat treatment(annealing), performing a tensile test and impact test, the specimen after the impact test is intended to evaluate the crack propagation characteristics by performing a fractal dimension analysis. The tensile strength of the base materials were observed higher compared to the heat treated materials, impact absorbed energy of heat treated materials was a higher than base materials. Impact Test and fractal dimension of the side of the test specimen was shown significantly more test temperature increases, heat treated material was higher than the base material

Abstract
 1. 서론
 2. 시험방법 및 결과
  2.1 시험용 재료 준비
  2.2 조직관찰 및 인장시험결과
  2.3 충격시험결과
  2.4 프랙털 특성
 3. 결론
 References

• 문윤배(수성대학교 컴퓨터기계설계과) | Yun-Bae Moon Corresponding Author
• 최병선(대구가톨릭대학교 기계자동차공학부) | Byung-Sun Choi