SCIENTIFIC ABSTRACT MARKO, I. - MARKON, L.O.

Document Type: 
Document Number (FOIA) /ESDN (CREST): 
CIA-RDP86-00513R001032420011-7
Release Decision: 
RIF
Original Classification: 
S
Document Page Count: 
100
Document Creation Date: 
November 2, 2016
Document Release Date: 
September 19, 2001
Sequence Number: 
11
Case Number: 
Publication Date: 
December 31, 1967
Content Type: 
SCIENTIFIC ABSTRACT
File: 
AttachmentSize
PDF icon CIA-RDP86-00513R001032420011-7.pdf3.65 MB
Body: 
A0C__NG _iW636393 SOURCE CODE: UR/0032/66/032/011 /14 05 /14 O9______1 AUTHOR: Bernahtey-n, M. L.; Marko, I. ORG: Moscow Institute of Steel and Alloys (Mookovskiy institut stall i splavov) TITLE: Characteristics of strese-strain diagrams of superstrength steel with strain- hardened martensite SOURCE: Zavodskaya laboratoriya, v. 32, no. 11, 1966, 1405-1ho6 TOPIC TAGS: superstrength steel, steel thermomecbanica-1 treatment, fitreso strain diagram, strain hardening/5OKhFA steel ABSTRACT: Specimens of 50KhFA steel were subjected to a combined thermomechnnical treatment (CTMT) which consisted of high-temperature thermomechanical treatment followed by quenching to obtain a martensitiC structure and tempering at 200C for 2 hr, and low temperature thermomechanical treatment (LTMT) which consisted of cold deformation with 1-3% reduction followed by aging at 100C for 40 hr. The diagrams of the conventionally treated specimens did not show a distinct yield point. The thermomechanically treated specimens, however, show very distinct upper and lower yield points (see Fig. 1). The difference between these tvo points in- creased v1th increasing reductions in LTNrtand in specimens deformed with 3% reduc- tion, amounted to 55 kg/m 2 j It Is assumed that aging of martensite vhose matrix Cord '2.2 AP6036393 ~Ig. 1. The effect of reduction in martensite deformation on the shape of the stress-strain curve of 50KhFA steel AV - I - Conventionally hardened and tempered at 20OC; 2 - same with 1% reduction aged at 100C -for 40 hr-, 3 - same vith 2% reductionj 4 4 same vith 3% reduction. 11ougation, Z vas distorted by cold deformation plays a significant part in strengthening. The second maximum on the stress-strain curve corresponds to the intensiye reduction of area and is brought about by the strain aging occuring during the test. Orig. art, hasi 3 figures. SUB CODE: 11, 13/ SUBM DATE. none/ ORIG REF: 0021 OTH RIWI 002/ ATD PRESS: 510T MARY(', J. Economic asp,~cts rr the manufaeturinp ;)r-cess-s. : .11 '~. (Techni