Hot Affect Region of Base Clad by Laser Beam and its Repeated-Impact Properties

2007 ◽  
Vol 10-12 ◽  
pp. 610-614
Author(s):  
Shi Hong Shi ◽  
Ming Di Wang
Keyword(s):  
Stainless Steel ◽  
Laser Beam ◽  
Laser Cladding ◽  
Impact Load ◽  
Repeated Impact ◽  
Impact Properties ◽  
Austenite Stainless Steel ◽  
Low Stiffness

The experiment result of base of laser cladding samples shows that more energy base absorb, more wide the Hot affect region. The base with the quenchable material will be quenched hardening and get refinement organization, such as medium steel, etc. Contrariwise the base of austenite stainless steel doesn’t have these phenomenons. Under the repeated impact load, the quenched hardening base may be softened and appear flaw easily, such as crack, etc. The base of low stiffness may be hardened in a distance.

Mechanics Behavior Analysis on Laser Cladding under Repeated Impacting Load

2010 ◽  
Vol 154-155 ◽  
pp. 1100-1103
Author(s):  
Ru Shu Peng ◽  
De Wen Tang ◽  
Qiong Liu
Keyword(s):  
Behavior Analysis ◽  
Stress Wave ◽  
Laser Cladding ◽  
Impact Load ◽  
Joint Surface ◽  
Impact Loads ◽  
Repeated Impact ◽  
Hardness Change

On the property of repeated impact load, the attrition, hardening and plasticity warp of the laser cladding sampling were researched by using stress wave spread theory. Results show that under repeated impact loads, stress wave occurs on the metallurgical joint surface of the coat and the basis, forming stretch wave that causes coat slitting and angle splitting. The micro-pits failure and deep exfoliation occur on the coat surface because of the stress centralization. The accumulation of impact load energy cause hardness change and plasticity warp.

A Mechanics Analysis of Formation and Expansion of Fatigue Crack in Laser Cladding on Repeated Impact Load

2008 ◽  
Vol 392-394 ◽  
pp. 109-115
Author(s):  
Ge Yan Fu ◽  
Shi Hong Shi
Keyword(s):  
Laser Cladding ◽  
Impact Load ◽  
Vacancy Concentration ◽  
Coating Material ◽  
Dispersion Strengthening ◽  
Impact Fatigue ◽  
Repeated Impact ◽  
Fine Crystal ◽  
Impact Compression ◽  
Combined Action

Coating samples prepared by laser cladding were subjected to repeated impact fatigue experiment. It is observed through phenomenological analysis that most coating cracks are original from the surface. And then, the cracks extend by the combined action of coating inner stress and repeated impact compression stress. The formation of crack is close related to performance of coating material. It can be divided to traversed crack and reticular crack from surface side; it also can be divided to vertical extend crack and reticular extend crack from the cross section side. Rigid and brickle coating has a shorter repeated impact life because a kind of linear crack is formed easily in it. On the other hand, tougher coating has a long life. Mechanics of nucleation and expansion of crack was explained by using stress concentration theory and vacancy concentration theory. The anti-repeated impact fatigue performance of laser cladding part could be improved by increasing toughness and reducing hardness of the coating material. Furthermore, suitable dispersion strengthening and fine-crystal strengthening can obtain the same purpose.

Effect of milling on the microstructure and mechanical property of austenite stainless steel

2020 ◽  
Vol 62 (12) ◽  
pp. 1181-1186
Author(s):  
Huanchun Wu ◽  
Wenxin Ti ◽  
Guodong Zhang ◽  
Fei Xue ◽  
Chengtao Li ◽  
...  
Keyword(s):  
Mechanical Property ◽  
Stainless Steel ◽  
Austenite Stainless Steel ◽  
Microstructure And Mechanical Property
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