scholarly journals Effect of automobile exhaust on some leaf micromorphological characteristics of some members of Verbanaceae, Annonaceae and Euphorbiaceae families

2017 ◽  
Vol 10 (1) ◽  
pp. 251 ◽  
Author(s):  
H Haruna ◽  
A.A. Aliko ◽  
F.A. Ahmad ◽  
A.W. Abubakar
Keyword(s):  
Alloy Digest ◽  
1972 ◽  
Vol 21 (4) ◽  

Abstract ALLEGHENY LUDLUM MF-2 is a 12% chromium steel that was developed initially for use in automobile exhaust systems. This datasheet provides information on composition, physical properties, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-270. Producer or source: Allegheny Ludlum Corporation.


1967 ◽  
Vol 22 (5) ◽  
pp. 563-570
Author(s):  
Yasushi Kodama ◽  
Eizaburo Kunitake ◽  
Noburu Ishinishi

Author(s):  
Wang Ying Hui ◽  
Liang Qiu Song ◽  
Lu Zhen Sheng ◽  
Wang Jiu Long ◽  
Chen Nan Xin

1975 ◽  
Vol 4 (3) ◽  
pp. 311-315
Author(s):  
Angelika Vlčková ◽  
Lúdovít Takáč ◽  
Gertrúda Urbánková

2011 ◽  
Vol 239-242 ◽  
pp. 1799-1803
Author(s):  
Hua Bing Li ◽  
Zhou Hua Jiang ◽  
Qi Feng Ma ◽  
Dong Ping Zhan

The high-temperature strength and thermal fatigue properties of Fe-Cr-Nb-Mo ferritic stainless steel (FSSNEW) developed for automobile exhaust system were investigated. The results show that the high-temperature tensile strength and yield strength of FSSNEW are better than or equal to those of the presently applied ferritic stainless steels. The thermal fatigue cracks nucleate at the V-notch. The inclusions along grain boundaries become prior regions for initiation of the cracks. The inclusions distributed at the defects make the formation of cracks in the materials easily through the effects of cycle thermal stress and thermal strain. The length and propagated rate of thermal fatigue cracks increase with the maximum tested temperature increasing. When the maximum temperature arrives at 900°C, the high-temperature oxidation is serious along the grain boundaries, which aggravates the cracks propagating along the grain boundaries. The principle mechanism of stress assisted grain boundary oxygen (SAGBO) embrittlement can be applied to illustrate the effects of external stress on aggravating the damage caused by environmental factors. Therefore, the high-temperature oxidation is the main reason for the propagation of thermal fatigue cracks. The FSSNEW is satisfied for the applied requirement of high-temperature strength in the hot side of the automobile exhaust system.


2018 ◽  
Author(s):  
Zongsong Wang ◽  
Gangfeng Tan ◽  
Longjie Xiao ◽  
Miaohua Huang ◽  
Houyu Yu ◽  
...  

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