418 Study of the Similarity between the Generation Mechanism of Cutting Burrs and of Work Hardened Surface Layers

2001 ◽  
Vol 2001.3 (0) ◽  
pp. 133-134
Author(s):  
Rikio HIKIJI ◽  
Yoshihiro KAWANO ◽  
Minoru ARAI
Keyword(s):  
Generation Mechanism ◽  
Surface Layers ◽  
Hardened Surface

scholarly journals Generation Mechanism of Work Hardened Surface Layer in Metal Cutting

2004 ◽  
Vol 47 (1) ◽  
pp. 405-411 ◽  
Author(s):  
Rikio HIKIJI ◽  
Eiji KONDO ◽  
Norio KAWAGOISHI ◽  
Minoru ARAI
Keyword(s):  
Surface Layer ◽  
Metal Cutting ◽  
Generation Mechanism ◽  
Hardened Surface

Formation of hardened surface layers in titanium under irradiation with intense ion beams

2001 ◽  
Vol 44 (4) ◽  
pp. 625-630 ◽  
Author(s):  
V Lavrentiev ◽  
C Hammerl ◽  
B Rauschenbach ◽  
O Kukharenko
Keyword(s):  
Ion Beams ◽  
Surface Layers ◽  
Hardened Surface

Asperity persistence and the real area of contact between rough surfaces

1972 ◽  
Vol 327 (1569) ◽  
pp. 147-157 ◽  
Keyword(s):  
Rough Surfaces ◽  
Intrinsic Property ◽  
Surface Layers ◽  
The Real ◽  
Real Area Of Contact ◽  
Heavy Loads ◽  
The Individual ◽  
Hardened Surface ◽  
Hard Ball ◽  
Real Area

It is well known that even under very heavy loads the hills on rough surfaces are not completely flattened. Many workers have advanced possible reasons for this remarkable persistence of the surface asperities. The most commonly advocated mechanisms are examined, and it is demonstrated that none of them provides an adequate explanation of the phenomenon. The plastic indentation of a flat by a hard ball is then studied, and the real area of contact is measured directly using high resolution profilometry. It is concluded that asperity persistence does not depend on the particular metal in contact. Nor is it an intrinsic property of the individual hills on the surface; there is no evidence that work hardening during the crushing of asperities can form a hardened surface layer which leads to a smaller contact area, as is commonly supposed. It is shown that, for local indentations, the degree of contact, i. e. the ratio of real to nominal area, is in general independent of the load. Whenever the surface layers are harder than the bulk the degree of contact is typically between one quarter and one third. However, when the indented body has a uniform hardness the degree of contact was found to be accurately equal to one-half.

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