Surface Crack in Hydrostatic Extrusion of Brittle Metal

スポンサーリンク

概要

• 論文の詳細を見る

• Surface crack produced during hydrostatic extrusion of brittle metal was investigated. The effect of die angle, length of die bearing and frictional force on the critical back pressure which prevents cracking was studied. It was found that the surface crack is initially produced in the perpendicular direction to the axis near the exit of deformation zone. Then, under some conditions, the crack propagates in the inclined direction to the axis, which is usually called the "fir-tree crack". It was suggested that the surface crack is produced by the axial tensile stress acting on the surface at the exit, which results from non-uniform deformation of the billet at the exit, elastic repulsive force of the die and frictional force between the die bearing and the billet.

• 一般社団法人日本機械学会の論文

著者

• Abe Takeji

  Faculty Of Engineering Kyoto University

• Oyane Moriya

  Faculty Of Engineering Kobe University.

• Noguchi Mitsuyuki

  Faculty Of Engineering Kyoto University

• YAMADA Tateo

  Faculty of Engineering, Kyoto University

• Yamada Tateo

  Faculty Of Engineering Kyoto University

• OYANE Moriya

  Faculty of Engineering, Kyoto University

関連論文

• Upper Bound Solutions for Extrusion with Two-Stage Conical Die and Curved Die
• Three-Dimensional Observation of Roughening of Free Surface during Compressive Plastic Deformation of Polycrystalline Iron
• X-Ray Investigation on Fatigue of Polycrystalline Metals : On the Relation between Crystal Orientation and Deformation in fcc Crystal
• Crystallographic Study of Yield Condition of Polycrystalline Metals : 1st Report, bcc Metal
• On the Roughening of Free Surface in Deformation Processes
• The Relationship between Lubrication and Surface Condition of Metals Deformed under Compression : 2nd Report, Experimental Study
• The Relationship between Lubrication and Surface Condition of Metals Deformed under Compression
• X-Ray Investigation on Fatigue Damage of Metals under Mean Stress : 2nd Report, Torsional Fatigue
• X-Ray Investigation on Fatigue Damage of Metals under Mean Stress : (1st Report, Plane Bending Fatigue)
• Surface Crack in Hydrostatic Extrusion of Brittle Metal
• Development of Laws of Similarity for Electrospark Forming
• Improvement of Formability of Metals in Extrusion by Means of Two-Stage Extrusion
• The Effect of Deformation Speed on Friction and Lubrication in Cold Forging
• Back Pressure Extrusion of Brittle Metals and Metallic Powder
• Criteria of Ductile Fracture Strain
• Fundamental Study on Electrohydraulic Forming
• Fundamental Study on Electrohydraulic Forming : III. The Effect of Diameter of Fuse Wire and Circuit Inductance on Pressure Pulse
• Thoery of Plasticity for Porous Metals
• Fundamental Study of Electrospark Forming : Deformation of Cylindrical Shell and Circular Diaphragm
• Fundamental Study on Electrohydraulic Forming : II. The Effect of Kinds of Fuse Wires and Circuit Inductance on Pressure Pulse
• Cold Back-Pressure Extrusion of Aluminium Powder
• Central Cracking of Extruded Product of Brittle Metal in Hydrostatic Extrusion : 2nd Report, Analysis
• Central Cracking of Extruded Product of Brittle Metal in Hydrostatic Extrusion : 1st Report, Experiment
• Crystallographic Study of Yield Condition of Polycrystalline Metals : (3rd Report, Relation between Slip in Crystals and Yield Condition)
• Elastic Deformation of Polycrystalline Metals : 3rd Report, Influence of Neighbor Grains
• Crystallographic Study of Yield Condition of Polycrystalline Metals : 2nd Report, hcp Metal
• Deformation of Polycrystalline Metal Composed of Anisotropic Crystals Having Various Stress-Strain Curves
• Deformation of Polycrystalline Metal Composed of Anisotropic Crystals Having Linear Stress-Strain Relation
• Elastic Deformation of Polycrystalline Metal :1st Report, Influence of grain shape on distributions of stress and strain in grains
• X-Ray Study of Surface Residual Stress Produced in Fatigue Process of Annealed Metals
• Elastic Deformation of Polycrystalline Metal : 2nd Report, Effect of Slenderness of Grains on Deformation Mode

もっと見る 閉じる

スポンサーリンク