Fracture in quenched and tempered low alloy steels
Fracture in quenched and tempered low alloy steels
(OP)
If I have a fracture surface showing some pockets of intergranular cracking and dimple mode after the tempering process, is it possible the part has undergone temper embrittlement or is this related to hydrogen embrittlement (from the moisture absorbed possibly during flame cutting). Anyways is there a way one can differentiate intergranular cracking due to hydrogen and temper embrittlement in Q&T steels.
(P content is 0.011 wt %; tempering done at around 750F)
(P content is 0.011 wt %; tempering done at around 750F)





RE: Fracture in quenched and tempered low alloy steels
I'm just one step away from being rich, all I need now is money.
( read somewhere on the internet)
RE: Fracture in quenched and tempered low alloy steels
RE: Fracture in quenched and tempered low alloy steels
It has always been a trick during straightening operation after Q&T operation. If you search in this forum, you could find references to similar experiences.
I'm just one step away from being rich, all I need now is money.
( read somewhere on the internet)
RE: Fracture in quenched and tempered low alloy steels
RE: Fracture in quenched and tempered low alloy steels
RE: Fracture in quenched and tempered low alloy steels
RE: Fracture in quenched and tempered low alloy steels
http://www.twi-global.com/technical-knowledge/faqs...
Here is a second paper for review that is descriptive regarding hydrogen embrittlement regarding failure analysis.
http://sti.srs.gov/fulltext/WSRC-STI-2008-00062.pd...
RE: Fracture in quenched and tempered low alloy steels
RE: Fracture in quenched and tempered low alloy steels
RE: Fracture in quenched and tempered low alloy steels
Alloy, Tempering temp/°F, Hardness/HRC
1030, 700, 39
1030, 800, 31
4130, 700, 42
4130, 800, 38
Due to the poor tempering, you have produced hardness values that lead to embrittlement.
RE: Fracture in quenched and tempered low alloy steels
RE: Fracture in quenched and tempered low alloy steels
I'm just one step away from being rich, all I need now is money.
( read somewhere on the internet)
RE: Fracture in quenched and tempered low alloy steels
RE: Fracture in quenched and tempered low alloy steels
Yes, I have sectioned the fracture area and the microstructure is tempered martensite near and far from the fracture. By hardness testing are we interested in finding any decarb layer?
RE: Fracture in quenched and tempered low alloy steels
RE: Fracture in quenched and tempered low alloy steels
RE: Fracture in quenched and tempered low alloy steels
RE: Fracture in quenched and tempered low alloy steels